Switch blink to use a gin-managed isolate.

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 171 matching lines @@
 {
     if (!status) {
         TRACE_EVENT_BEGIN0("v8", name);
     } else {
         TRACE_EVENT_END0("v8", name);
     }
 }
 
 static void initializeV8Common(v8::Isolate* isolate)
 {
-    v8::ResourceConstraints constraints;
-    constraints.ConfigureDefaults(static_cast<uint64_t>(blink::Platform::current()->physicalMemoryMB()) << 20, static_cast<uint32_t>(blink::Platform::current()->virtualMemoryLimitMB()) << 20, static_cast<uint32_t>(blink::Platform::current()->numberOfProcessors()));
-    v8::SetResourceConstraints(isolate, &constraints);
-
     v8::V8::AddGCPrologueCallback(V8GCController::gcPrologue);
     v8::V8::AddGCEpilogueCallback(V8GCController::gcEpilogue);
 
     v8::Debug::SetLiveEditEnabled(isolate, false);
 
     isolate->SetAutorunMicrotasks(false);
 }
 
-void V8Initializer::initializeMainThreadIfNeeded(v8::Isolate* isolate)
+void V8Initializer::initializeMainThreadIfNeeded()
 {
     ASSERT(isMainThread());
 
     static bool initialized = false;
     if (initialized)
         return;
     initialized = true;
 
+    gin::IsolateHolder::Initialize(gin::IsolateHolder::kNonStrictMode, v8ArrayBufferAllocator());
+
+    v8::Isolate* isolate = V8PerIsolateData::initialize();
+
     initializeV8Common(isolate);
 
     v8::V8::SetFatalErrorHandler(reportFatalErrorInMainThread);
-    V8PerIsolateData::ensureInitialized(isolate);
     v8::V8::AddMessageListener(messageHandlerInMainThread);
     v8::V8::SetFailedAccessCheckCallbackFunction(failedAccessCheckCallbackInMainThread);
     v8::V8::SetAllowCodeGenerationFromStringsCallback(codeGenerationCheckCallbackInMainThread);
 
     isolate->SetEventLogger(timerTraceProfilerInMainThread);
 
     ScriptProfiler::initialize();
 }
 
 static void reportFatalErrorInWorker(const char* location, const char* message)
@@ skipping 42 matching lines @@
     v8::V8::AddMessageListener(messageHandlerInWorker);
     v8::V8::SetFatalErrorHandler(reportFatalErrorInWorker);
 
     v8::ResourceConstraints resourceConstraints;
     uint32_t here;
     resourceConstraints.set_stack_limit(&here - kWorkerMaxStackSize / sizeof(uint32_t*));
     v8::SetResourceConstraints(isolate, &resourceConstraints);
 }
 
 } // namespace blink