Sharing of SharedArrayBuffer via PostMessage transfer

Source/bindings/core/v8/V8Initializer.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 341 matching lines @@
     } else {
         TRACE_EVENT_END0("v8", name);
     }
 }
 
 static void initializeV8Common(v8::Isolate* isolate)
 {
     v8::V8::AddGCPrologueCallback(V8GCController::gcPrologue);
     v8::V8::AddGCEpilogueCallback(V8GCController::gcEpilogue);
 
+    if (RuntimeEnabledFeatures::sharedArrayBufferEnabled()) {
+        static const char kSharedArrayBuffer[] = "--harmony-sharedarraybuffer";
+        v8::V8::SetFlagsFromString(kSharedArrayBuffer, sizeof(kSharedArrayBuffer));

[jochen (gone - plz use gerrit), 2015/07/10 09:07:40]

we should first land this once shared array buffers are enabled in v8

[binji, 2015/07/10 18:34:46]

Sorry, I don't understand. Is it dangerous to add a blink runtime flag? Should I
just set the status to "test" for now?

+    }
+
     v8::Debug::SetLiveEditEnabled(isolate, false);
 
     isolate->SetAutorunMicrotasks(false);
 }
 
 namespace {
 
 class ArrayBufferAllocator : public v8::ArrayBuffer::Allocator {
     virtual void* Allocate(size_t size) override
     {
@@ skipping 102 matching lines @@
 
     v8::V8::AddMessageListener(messageHandlerInWorker);
     v8::V8::SetFatalErrorHandler(reportFatalErrorInWorker);
 
     uint32_t here;
     isolate->SetStackLimit(reinterpret_cast<uintptr_t>(&here - kWorkerMaxStackSize / sizeof(uint32_t*)));
     isolate->SetPromiseRejectCallback(promiseRejectHandlerInWorker);
 }
 
 } // namespace blink