deps: define missing operator delete functions

Section 3.2 of the C++ standard states that destructor definitions
implicitly "use" operator delete functions. Therefore, these operator
delete functions must be defined even if they are never called by
user code explicitly.
http://www.open-std.org/JTC1/SC22/WG21/docs/cwg_defects.html#261

gcc allows them to remain as empty definitions. However, not all
compilers allow this.

This pull request creates definitions which if ever called, result
in an abort.

PR-URL: #10356
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Rod Vagg <rod@vagg.org>

deps/v8/src/api.cc

@@ -598,6 +598,11 @@ HandleScope::~HandleScope() {
 }
 
 
+void HandleScope::operator delete(void*, size_t) {
+  base::OS::Abort();
+}
+
+
 int HandleScope::NumberOfHandles(Isolate* isolate) {
   return i::HandleScope::NumberOfHandles(
       reinterpret_cast<i::Isolate*>(isolate));
@@ -623,6 +628,11 @@ EscapableHandleScope::EscapableHandleScope(Isolate* v8_isolate) {
 }
 
 
+void EscapableHandleScope::operator delete(void*, size_t) {
+  base::OS::Abort();
+}
+
+
 i::Object** EscapableHandleScope::Escape(i::Object** escape_value) {
   i::Heap* heap = reinterpret_cast<i::Isolate*>(GetIsolate())->heap();
   Utils::ApiCheck(*escape_slot_ == heap->the_hole_value(),
@@ -658,6 +668,11 @@ SealHandleScope::~SealHandleScope() {
 }
 
 
+void SealHandleScope::operator delete(void*, size_t) {
+  base::OS::Abort();
+}
+
+
 void Context::Enter() {
   i::Handle<i::Context> env = Utils::OpenHandle(this);
   i::Isolate* isolate = env->GetIsolate();
@@ -1884,6 +1899,11 @@ v8::TryCatch::~TryCatch() {
 }
 
 
+void v8::TryCatch::operator delete(void*, size_t) {
+  base::OS::Abort();
+}
+
+
 bool v8::TryCatch::HasCaught() const {
   return !reinterpret_cast<i::Object*>(exception_)->IsTheHole();
 }
@@ -6449,6 +6469,11 @@ void Isolate::RemoveGCEpilogueCallback(GCEpilogueCallback callback) {
 }
 
 
+void Isolate::operator delete(void*, size_t) {
+  base::OS::Abort();
+}
+
+
 void V8::AddGCPrologueCallback(GCPrologueCallback callback, GCType gc_type) {
   i::Isolate* isolate = i::Isolate::Current();
   isolate->heap()->AddGCPrologueCallback(

deps/v8/src/version.cc

@@ -35,7 +35,7 @@
 #define MAJOR_VERSION     3
 #define MINOR_VERSION     28
 #define BUILD_NUMBER      71
-#define PATCH_LEVEL 19
+#define PATCH_LEVEL 20
 // Use 1 for candidates and 0 otherwise.
 // (Boolean macro values are not supported by all preprocessors.)
 #define IS_CANDIDATE_VERSION 0