support source protection with snapshot

Fix #269

src/common/shell_switches.cc

@@ -40,6 +40,9 @@ const char kWorkingDirectory[] = "working-directory";
 // Pass the main script to node.
 const char kNodeMain[] = "node-main";
 
+// snapshot file path
+const char kSnapshot[] = "snapshot";
+
 const char kmMain[]   = "main";
 const char kmName[]   = "name";
 const char kmWebkit[] = "webkit";

src/common/shell_switches.h

@@ -15,6 +15,7 @@ extern const char kNoToolbar[];
 extern const char kUrl[];
 extern const char kWorkingDirectory[];
 extern const char kNodeMain[];
+extern const char kSnapshot[];
 
 // Manifest settings
 extern const char kmMain[];

src/renderer/shell_content_renderer_client.cc

@@ -103,8 +103,15 @@ void ShellContentRendererClient::RenderThreadStarted() {
   // Initialize uv.
   node::SetupUv(argc, argv);
 
+  std::string snapshot_path;
+  if (command_line->HasSwitch(switches::kSnapshot)) {
+    snapshot_path = command_line->GetSwitchValuePath(switches::kSnapshot).AsUTF8Unsafe();
+  }
   // Initialize node after render thread is started.
-  v8::V8::Initialize();
+  if (!snapshot_path.empty()) {
+    v8::V8::Initialize(snapshot_path.c_str());
+  }else
+    v8::V8::Initialize();
   v8::HandleScope scope;
 
   // Install window bindings into node. The Window API is implemented in node's

src/shell_content_browser_client.cc

@@ -132,6 +132,10 @@ void ShellContentBrowserClient::AppendExtraCommandLineSwitches(
     std::string node_main;
     if (package->root()->GetString(switches::kNodeMain, &node_main))
       command_line->AppendSwitchASCII(switches::kNodeMain, node_main);
+
+    std::string snapshot_path;
+    if (package->root()->GetString(switches::kSnapshot, &snapshot_path))
+      command_line->AppendSwitchASCII(switches::kSnapshot, snapshot_path);
   }
 }