Update Isolate::RequestGarbageCollection after r18691

src/extensions/gc-extension.cc

 // Copyright 2010 the V8 project authors. All rights reserved.
 // 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
@@ skipping 22 matching lines @@
 
 
 v8::Handle<v8::FunctionTemplate> GCExtension::GetNativeFunctionTemplate(
     v8::Isolate* isolate,
     v8::Handle<v8::String> str) {
   return v8::FunctionTemplate::New(isolate, GCExtension::GC);
 }
 
 
 void GCExtension::GC(const v8::FunctionCallbackInfo<v8::Value>& args) {
-  i::Isolate* isolate = reinterpret_cast<i::Isolate*>(args.GetIsolate());
-  if (args[0]->BooleanValue()) {
-    isolate->heap()->CollectGarbage(
-        NEW_SPACE, "gc extension", v8::kGCCallbackFlagForced);
-  } else {
-    isolate->heap()->CollectAllGarbage(Heap::kAbortIncrementalMarkingMask,
-        "gc extension", v8::kGCCallbackFlagForced);
-  }
+  args.GetIsolate()->RequestGarbageCollectionForTesting(
+      args[0]->BooleanValue() ? v8::Isolate::kMinorGarbageCollection
+                              : v8::Isolate::kFullGarbageCollection);
 }
 
 } }  // namespace v8::internal