Do V8 GC ASAP if system memory is pressured

content/renderer/render_thread_impl.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_RENDERER_RENDER_THREAD_IMPL_H_
 #define CONTENT_RENDERER_RENDER_THREAD_IMPL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 13 matching lines @@
 #include "build/build_config.h"
 #include "content/child/child_thread_impl.h"
 #include "content/common/content_export.h"
 #include "content/common/frame_replication_state.h"
 #include "content/common/gpu/client/gpu_channel_host.h"
 #include "content/public/renderer/render_thread.h"
 #include "content/renderer/gpu/compositor_dependencies.h"
 #include "net/base/network_change_notifier.h"
 #include "third_party/WebKit/public/platform/WebConnectionType.h"
 #include "ui/gfx/native_widget_types.h"
+#include "v8/include/v8.h"
 
 #if defined(OS_MACOSX)
 #include "third_party/WebKit/public/web/mac/WebScrollbarTheme.h"
 #endif
 
 class GrContext;
 class SkBitmap;
 struct FrameMsg_NewFrame_Params;
 struct ViewMsg_New_Params;
 struct ViewMsg_UpdateScrollbarTheme_Params;
@@ skipping 466 matching lines @@
                              const std::string& highlight_color);
 #endif
   void OnCreateNewSharedWorker(
       const WorkerProcessMsg_CreateWorker_Params& params);
   bool RendererIsHidden() const;
   void OnRendererHidden();
   void OnRendererVisible();
 
   void ReleaseFreeMemory();
 
+  void IsMemoryPressured(bool memory_pressured);
+  static void OnV8InterruptCallback(v8::Isolate* isolate, void* data);
+
   scoped_ptr<WebGraphicsContext3DCommandBufferImpl> CreateOffscreenContext3d();
 
   // These objects live solely on the render thread.
   scoped_ptr<AppCacheDispatcher> appcache_dispatcher_;
   scoped_ptr<DomStorageDispatcher> dom_storage_dispatcher_;
   scoped_ptr<IndexedDBDispatcher> main_thread_indexed_db_dispatcher_;
   scoped_ptr<scheduler::RendererScheduler> renderer_scheduler_;
   scoped_ptr<RendererBlinkPlatformImpl> blink_platform_impl_;
   scoped_ptr<ResourceDispatchThrottler> resource_dispatch_throttler_;
   scoped_ptr<CacheStorageDispatcher> main_thread_cache_storage_dispatcher_;
@@ skipping 166 matching lines @@
 
     int routing_id_;
     mojo::shell::mojom::InterfaceProviderRequest services_;
     mojo::shell::mojom::InterfaceProviderPtr exposed_services_;
   };
 
   typedef std::map<int, scoped_refptr<PendingRenderFrameConnect>>
       PendingRenderFrameConnectMap;
   PendingRenderFrameConnectMap pending_render_frame_connects_;
 
+  bool is_v8_need_gc_;
+
   DISALLOW_COPY_AND_ASSIGN(RenderThreadImpl);
 };
 
 #if defined(COMPILER_MSVC)
 #pragma warning(pop)
 #endif
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDER_THREAD_IMPL_H_