Report DOM partitionAlloc size to V8 GC.

Source/bindings/v8/V8GCController.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:
  *
  *     * 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
@@ skipping 30 matching lines @@
 #include "core/dom/Attr.h"
 #include "core/dom/NodeTraversal.h"
 #include "core/dom/TemplateContentDocumentFragment.h"
 #include "core/dom/shadow/ElementShadow.h"
 #include "core/dom/shadow/ShadowRoot.h"
 #include "core/html/HTMLImageElement.h"
 #include "core/html/HTMLTemplateElement.h"
 #include "core/html/imports/HTMLImportsController.h"
 #include "core/inspector/InspectorTraceEvents.h"
 #include "core/svg/SVGElement.h"
+#include "platform/Partitions.h"
 #include "platform/TraceEvent.h"
 #include <algorithm>
 
 namespace WebCore {
 
 // FIXME: This should use opaque GC roots.
 static void addReferencesForNodeWithEventListeners(v8::Isolate* isolate, Node* node, const v8::Persistent<v8::Object>& wrapper)
 {
     ASSERT(node->hasEventListeners());
 
@@ skipping 369 matching lines @@
 
 void V8GCController::collectGarbage(v8::Isolate* isolate)
 {
     v8::HandleScope handleScope(isolate);
     RefPtr<ScriptState> scriptState = ScriptState::create(v8::Context::New(isolate), DOMWrapperWorld::create());
     ScriptState::Scope scope(scriptState.get());
     V8ScriptRunner::compileAndRunInternalScript(v8String(isolate, "if (gc) gc();"), isolate);
     scriptState->disposePerContextData();
 }
 
+void V8GCController::reportDOMMemoryUsageToV8(v8::Isolate* isolate)
+{
+    if (!isMainThread())
+        return;
+
+    static size_t lastUsageReportedToV8 = 0;
+
+    size_t currentUsage = Partitions::currentDOMMemoryUsage();
+    ssize_t diff = static_cast<ssize_t>(currentUsage) - static_cast<ssize_t>(lastUsageReportedToV8);
+    isolate->AdjustAmountOfExternalAllocatedMemory(diff);
+
+    lastUsageReportedToV8 = currentUsage;
+}
+
 }  // namespace WebCore