diff --git a/third_party/protobuf/3.0.0/BUILD b/third_party/protobuf/3.0.0/BUILD
index 46a34ebf0d8f3c..4b97838b55f78a 100644
--- a/third_party/protobuf/3.0.0/BUILD
+++ b/third_party/protobuf/3.0.0/BUILD
@@ -116,6 +116,7 @@ cc_library(
         "src/google/protobuf/extension_set.cc",
         "src/google/protobuf/generated_message_util.cc",
         "src/google/protobuf/io/coded_stream.cc",
+        "src/google/protobuf/io/io_win32.cc",
         "src/google/protobuf/io/zero_copy_stream.cc",
         "src/google/protobuf/io/zero_copy_stream_impl_lite.cc",
         "src/google/protobuf/message_lite.cc",
@@ -161,6 +162,7 @@ cc_library(
         "src/google/protobuf/field_mask.pb.cc",
         "src/google/protobuf/generated_message_reflection.cc",
         "src/google/protobuf/io/gzip_stream.cc",
+        "src/google/protobuf/io/io_win32.cc",
         "src/google/protobuf/io/printer.cc",
         "src/google/protobuf/io/strtod.cc",
         "src/google/protobuf/io/tokenizer.cc",
diff --git a/third_party/protobuf/3.0.0/src/google/protobuf/compiler/command_line_interface.cc b/third_party/protobuf/3.0.0/src/google/protobuf/compiler/command_line_interface.cc
index be47bbabe4e9e2..f441cfa6bd5b21 100644
--- a/third_party/protobuf/3.0.0/src/google/protobuf/compiler/command_line_interface.cc
+++ b/third_party/protobuf/3.0.0/src/google/protobuf/compiler/command_line_interface.cc
@@ -35,10 +35,6 @@
 #include <google/protobuf/compiler/command_line_interface.h>
 #include <google/protobuf/stubs/platform_macros.h>
 
-#ifdef _MSC_VER
-#include <Windows.h>
-#endif
-
 #include <stdio.h>
 #include <sys/types.h>
 #include <sys/stat.h>
@@ -56,7 +52,6 @@
 
 #include <limits.h> //For PATH_MAX
 
-#include <string>
 #include <memory>
 #ifndef _SHARED_PTR_H
 #include <google/protobuf/stubs/shared_ptr.h>
@@ -79,6 +74,7 @@
 #include <google/protobuf/io/coded_stream.h>
 #include <google/protobuf/io/zero_copy_stream_impl.h>
 #include <google/protobuf/io/printer.h>
+#include <google/protobuf/io/io_win32.h>
 #include <google/protobuf/stubs/logging.h>
 #include <google/protobuf/stubs/strutil.h>
 #include <google/protobuf/stubs/substitute.h>
@@ -90,88 +86,6 @@ namespace google {
 namespace protobuf {
 namespace compiler {
 
-#if defined(_WIN32)
-
-static bool is_path_absolute(const std::string& path) {
-  return ((path.size() > 2 && path[1] == ':') ||
-          (path.size() > 4 && path[0] == '\\' && path[1] == '\\' &&
-           path[2] == '?' && path[3] == '\\'));
-}
-
-static std::wstring as_windows_path(const std::string& path) {
-  // Convert `path` to WCHAR string.
-  int len =
-      ::MultiByteToWideChar(CP_UTF8, 0, path.c_str(), path.size(), NULL, 0);
-  std::unique_ptr<WCHAR[]> wbuf(new WCHAR[len + 1]);
-  ::MultiByteToWideChar(CP_UTF8, 0, path.c_str(), path.size(), wbuf.get(),
-                        len + 1);
-  wbuf.get()[len] = 0;
-
-  // Replace all '/' with '\'.
-  for (WCHAR* p = wbuf.get(); *p != L'\0'; ++p) {
-    if (*p == L'/') {
-      *p = L'\\';
-    }
-  }
-
-  // Create a wstring of the WCHAR buffer.
-  std::wstring wpath(wbuf.get());
-
-  // Make the path absolute.
-  if (!is_path_absolute(path)) {
-    // Get the current working directory.
-    DWORD result = ::GetCurrentDirectoryW(0, NULL);
-    std::unique_ptr<WCHAR[]> cwd(new WCHAR[result]);
-    ::GetCurrentDirectoryW(result, cwd.get());
-    cwd.get()[result - 1] = 0;
-    std::wstring wcwd(cwd.get());
-    // Make the path absolute by appending it to the cwd.
-    wpath = wcwd.back() == L'\\' ? (wcwd + wpath) : (wcwd + L'\\' + wpath);
-  }
-
-  // Prepend UNC prefix if necessary.
-  if (wpath.size() >= MAX_PATH) {
-    wpath = std::wstring(L"\\\\?\\") + wpath;
-  }
-
-  return wpath;
-}
-
-#ifdef open
-#undef open
-#endif
-static int open(const char* path, int flags, int mode) {
-  return _wopen(as_windows_path(path).c_str(), flags, mode);
-}
-
-#ifdef mkdir
-#undef mkdir
-#endif
-static int mkdir(const char* name, int _mode) {
-  return _wmkdir(as_windows_path(name).c_str());
-}
-
-#ifdef access
-#undef access
-#endif
-static int access(const char* pathname, int mode) {
-  return _waccess(as_windows_path(pathname).c_str(), mode);
-}
-
-#ifndef W_OK
-#define W_OK 02  // not defined by MSVC for whatever reason
-#endif
-#ifndef F_OK
-#define F_OK 00  // not defined by MSVC for whatever reason
-#endif
-#ifndef STDIN_FILENO
-#define STDIN_FILENO 0
-#endif
-#ifndef STDOUT_FILENO
-#define STDOUT_FILENO 1
-#endif
-#endif  // defined(_WIN32)
-
 #ifndef O_BINARY
 #ifdef _O_BINARY
 #define O_BINARY _O_BINARY
diff --git a/third_party/protobuf/3.0.0/src/google/protobuf/compiler/importer.cc b/third_party/protobuf/3.0.0/src/google/protobuf/compiler/importer.cc
index 0d9093c047eae3..1182a6ba4c8b2d 100644
--- a/third_party/protobuf/3.0.0/src/google/protobuf/compiler/importer.cc
+++ b/third_party/protobuf/3.0.0/src/google/protobuf/compiler/importer.cc
@@ -32,9 +32,7 @@
 //  Based on original Protocol Buffers design by
 //  Sanjay Ghemawat, Jeff Dean, and others.
 
-#ifdef _MSC_VER
-#include <io.h>
-#else
+#ifndef _MSC_VER
 #include <unistd.h>
 #endif
 #include <sys/types.h>
@@ -51,6 +49,7 @@
 #include <google/protobuf/compiler/importer.h>
 
 #include <google/protobuf/compiler/parser.h>
+#include <google/protobuf/io/io_win32.h>
 #include <google/protobuf/io/tokenizer.h>
 #include <google/protobuf/io/zero_copy_stream_impl.h>
 #include <google/protobuf/stubs/strutil.h>
@@ -60,9 +59,6 @@ namespace protobuf {
 namespace compiler {
 
 #ifdef _WIN32
-#ifndef F_OK
-#define F_OK 00  // not defined by MSVC for whatever reason
-#endif
 #include <ctype.h>
 #endif
 
diff --git a/third_party/protobuf/3.0.0/src/google/protobuf/compiler/objectivec/objectivec_helpers.cc b/third_party/protobuf/3.0.0/src/google/protobuf/compiler/objectivec/objectivec_helpers.cc
index 22c7a883d0d469..055464493d7443 100644
--- a/third_party/protobuf/3.0.0/src/google/protobuf/compiler/objectivec/objectivec_helpers.cc
+++ b/third_party/protobuf/3.0.0/src/google/protobuf/compiler/objectivec/objectivec_helpers.cc
@@ -28,9 +28,7 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-#ifdef _MSC_VER
-#include <io.h>
-#else
+#ifndef _MSC_VER
 #include <unistd.h>
 #endif
 #include <climits>
@@ -46,6 +44,7 @@
 #include <google/protobuf/compiler/objectivec/objectivec_helpers.h>
 #include <google/protobuf/io/coded_stream.h>
 #include <google/protobuf/io/zero_copy_stream_impl.h>
+#include <google/protobuf/io/io_win32.h>
 #include <google/protobuf/descriptor.pb.h>
 #include <google/protobuf/stubs/common.h>
 #include <google/protobuf/stubs/strutil.h>
diff --git a/third_party/protobuf/3.0.0/src/google/protobuf/compiler/plugin.cc b/third_party/protobuf/3.0.0/src/google/protobuf/compiler/plugin.cc
index 2ff50f61f47a8d..56b6374d2cdea2 100644
--- a/third_party/protobuf/3.0.0/src/google/protobuf/compiler/plugin.cc
+++ b/third_party/protobuf/3.0.0/src/google/protobuf/compiler/plugin.cc
@@ -38,12 +38,6 @@
 #ifdef _WIN32
 #include <io.h>
 #include <fcntl.h>
-#ifndef STDIN_FILENO
-#define STDIN_FILENO 0
-#endif
-#ifndef STDOUT_FILENO
-#define STDOUT_FILENO 1
-#endif
 #else
 #include <unistd.h>
 #endif
@@ -53,6 +47,7 @@
 #include <google/protobuf/compiler/plugin.pb.h>
 #include <google/protobuf/compiler/code_generator.h>
 #include <google/protobuf/descriptor.h>
+#include <google/protobuf/io/io_win32.h>
 #include <google/protobuf/io/zero_copy_stream_impl.h>
 
 
diff --git a/third_party/protobuf/3.0.0/src/google/protobuf/io/io_win32.cc b/third_party/protobuf/3.0.0/src/google/protobuf/io/io_win32.cc
new file mode 100644
index 00000000000000..d30bcf0bfe1ffc
--- /dev/null
+++ b/third_party/protobuf/3.0.0/src/google/protobuf/io/io_win32.cc
@@ -0,0 +1,159 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2008 Google Inc.  All rights reserved.
+// https://developers.google.com/protocol-buffers/
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Author: laszlocsomor@google.com (Laszlo Csomor)
+//
+// Implementation for long-path-aware open/mkdir/access on Windows.
+//
+// These functions convert the input path to an absolute Windows path
+// with UNC prefix if necessary, then pass that to
+// _wopen/_wmkdir/_waccess (declared in <io.h>) respectively. This
+// allows working with files/directories whose paths is longer than
+// MAX_PATH (260 chars).
+//
+// This file is only used on Windows, it's empty on other platforms.
+
+#if defined(_WIN32)
+
+#include <Windows.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <io.h>
+
+#include <string>
+#include <memory>
+
+#include <google/protobuf/io/io_win32.h>
+
+namespace google {
+namespace protobuf {
+namespace io {
+namespace win32 {
+
+template <typename char_type>
+static bool has_unc_prefix(const std::basic_string<char_type>& path) {
+  return path.size() > 4 && path[0] == '\\' && path[1] == '\\' &&
+         path[2] == '?' && path[3] == '\\';
+}
+
+template <typename char_type>
+static bool is_path_absolute(const std::basic_string<char_type>& path) {
+  return (path.size() > 2 && path[1] == ':') || has_unc_prefix(path);
+}
+
+template <typename char_type>
+static bool is_separator(char_type c) {
+  return c == '/' || c == '\\';
+}
+
+static void replace_directory_separators(WCHAR* p) {
+  for (; *p != L'\0'; ++p) {
+    if (*p == L'/') {
+      *p = L'\\';
+    }
+  }
+}
+
+static std::wstring get_cwd() {
+  DWORD result = ::GetCurrentDirectoryW(0, NULL);
+  std::unique_ptr<WCHAR[]> cwd(new WCHAR[result]);
+  ::GetCurrentDirectoryW(result, cwd.get());
+  cwd.get()[result - 1] = 0;
+  replace_directory_separators(cwd.get());
+  return std::move(std::wstring(cwd.get()));
+}
+
+static std::wstring join_paths(const std::wstring& path1, 
+                               const std::wstring& path2) {
+  if (path1.empty() || is_path_absolute(path2)) {
+    return path2;
+  }
+  if (path2.empty()) {
+    return path1;
+  }
+
+  if (is_separator(path1.back())) {
+    return is_separator(path2.front())
+        ? (path1 + path2.substr(1))
+        : (path1 + path2);
+  } else {
+    return is_separator(path2.front())
+        ? (path1 + path2)
+        : (path1 + L'\\' + path2);
+  }
+}
+
+static std::wstring as_wchar_path(const std::string& path) {
+  int len = ::MultiByteToWideChar(CP_UTF8, 0, path.c_str(), path.size(),
+                                  NULL, 0);
+  std::unique_ptr<WCHAR[]> wbuf(new WCHAR[len + 1]);
+  ::MultiByteToWideChar(CP_UTF8, 0, path.c_str(), path.size(),
+                        wbuf.get(), len + 1);
+  wbuf.get()[len] = 0;
+  replace_directory_separators(wbuf.get());
+  return std::move(std::wstring(wbuf.get()));
+}
+
+static std::wstring as_windows_path(const std::string& path,
+                                    size_t max_path) {
+  std::wstring wpath(as_wchar_path(path));
+  if (!is_path_absolute(path)) {
+    wpath = join_paths(get_cwd(), wpath);
+  }
+  if (wpath.size() >= max_path && !has_unc_prefix(wpath)) {
+    wpath = std::wstring(L"\\\\?\\") + wpath;
+  }
+  return wpath;
+}
+
+int open(const char* path, int flags, int mode) {
+  return ::_wopen(as_windows_path(path, MAX_PATH).c_str(), flags, mode);
+}
+
+int mkdir(const char* name, int _mode) {
+  // CreateDirectoryA's limit is 248 chars, see MSDN.
+  // https://msdn.microsoft.com/en-us/library/windows/desktop/aa363855(v=vs.85).aspx
+  // This limit presumably includes the null-terminator, because other
+  // functions that have the MAX_PATH limit, such as CreateFileA,
+  // actually include it.
+  return ::_wmkdir(as_windows_path(name, 248).c_str());
+}
+
+int access(const char* pathname, int mode) {
+  return ::_waccess(as_windows_path(pathname, MAX_PATH).c_str(), mode);
+}
+
+}  // namespace win32
+}  // namespace io
+}  // namespace protobuf
+}  // namespace google
+
+#endif  // defined(_WIN32)
diff --git a/third_party/protobuf/3.0.0/src/google/protobuf/io/io_win32.h b/third_party/protobuf/3.0.0/src/google/protobuf/io/io_win32.h
new file mode 100644
index 00000000000000..45050a28b72a39
--- /dev/null
+++ b/third_party/protobuf/3.0.0/src/google/protobuf/io/io_win32.h
@@ -0,0 +1,91 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2008 Google Inc.  All rights reserved.
+// https://developers.google.com/protocol-buffers/
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Author: laszlocsomor@google.com (Laszlo Csomor)
+//
+// This file contains the declarations for Windows implementations of
+// commonly used POSIX functions such as open(2) and access(2), as well
+// as macro definitions for flags of these functions.
+//
+// This file is only used on Windows, it's empty on other platforms.
+
+#ifndef GOOGLE_PROTOBUF_IO_IO_WIN32_H__
+#define GOOGLE_PROTOBUF_IO_IO_WIN32_H__
+
+#if defined(_WIN32)
+
+namespace google {
+namespace protobuf {
+namespace io {
+namespace win32 {
+
+int open(const char* path, int flags, int mode = 0);
+int mkdir(const char* name, int _mode);
+int access(const char* pathname, int mode);
+
+}  // namespace win32
+}  // namespace io
+}  // namespace protobuf
+}  // namespace google
+
+#ifdef open
+#undef open
+#endif
+#define open ::google::protobuf::io::win32::open
+
+#ifdef mkdir
+#undef mkdir
+#endif
+#define mkdir ::google::protobuf::io::win32::mkdir
+
+#ifdef access
+#undef access
+#endif
+#define access ::google::protobuf::io::win32::access
+
+#ifndef W_OK
+#define W_OK 02  // not defined by MSVC for whatever reason
+#endif
+
+#ifndef F_OK
+#define F_OK 00  // not defined by MSVC for whatever reason
+#endif
+
+#ifndef STDIN_FILENO
+#define STDIN_FILENO 0
+#endif
+
+#ifndef STDOUT_FILENO
+#define STDOUT_FILENO 1
+#endif
+
+#endif  // defined(_WIN32)
+
+#endif  // GOOGLE_PROTOBUF_IO_IO_WIN32_H__
diff --git a/third_party/protobuf/3.0.0/src/google/protobuf/io/zero_copy_stream_impl.cc b/third_party/protobuf/3.0.0/src/google/protobuf/io/zero_copy_stream_impl.cc
index 7ec2b5da5cb9da..452bd0f9913d04 100644
--- a/third_party/protobuf/3.0.0/src/google/protobuf/io/zero_copy_stream_impl.cc
+++ b/third_party/protobuf/3.0.0/src/google/protobuf/io/zero_copy_stream_impl.cc
@@ -44,6 +44,7 @@
 #include <iostream>
 #include <algorithm>
 
+#include <google/protobuf/io/io_win32.h>
 #include <google/protobuf/io/zero_copy_stream_impl.h>
 #include <google/protobuf/stubs/common.h>
 #include <google/protobuf/stubs/logging.h>
diff --git a/third_party/protobuf/3.0.0/src/google/protobuf/io/zero_copy_stream_unittest.cc b/third_party/protobuf/3.0.0/src/google/protobuf/io/zero_copy_stream_unittest.cc
index a9db8872d41e49..b2f545d6fdf5dc 100644
--- a/third_party/protobuf/3.0.0/src/google/protobuf/io/zero_copy_stream_unittest.cc
+++ b/third_party/protobuf/3.0.0/src/google/protobuf/io/zero_copy_stream_unittest.cc
@@ -65,6 +65,7 @@
 
 #include <google/protobuf/testing/file.h>
 #include <google/protobuf/io/coded_stream.h>
+#include <google/protobuf/io/io_win32.h>
 #include <google/protobuf/io/zero_copy_stream_impl.h>
 
 #if HAVE_ZLIB
diff --git a/third_party/protobuf/3.0.0/src/google/protobuf/message_unittest.cc b/third_party/protobuf/3.0.0/src/google/protobuf/message_unittest.cc
index d668a1a6bb62e7..2954851de1582b 100644
--- a/third_party/protobuf/3.0.0/src/google/protobuf/message_unittest.cc
+++ b/third_party/protobuf/3.0.0/src/google/protobuf/message_unittest.cc
@@ -48,6 +48,7 @@
 #include <google/protobuf/test_util.h>
 #include <google/protobuf/unittest.pb.h>
 #include <google/protobuf/io/coded_stream.h>
+#include <google/protobuf/io/io_win32.h>
 #include <google/protobuf/io/zero_copy_stream_impl.h>
 #include <google/protobuf/descriptor.pb.h>
 #include <google/protobuf/descriptor.h>