Low memory page navigation GC for low end devices

third_party/WebKit/Source/bindings/core/v8/WindowProxy.h

Index: third_party/WebKit/Source/bindings/core/v8/WindowProxy.h
diff --git a/third_party/WebKit/Source/bindings/core/v8/WindowProxy.h b/third_party/WebKit/Source/bindings/core/v8/WindowProxy.h
index f42a069a37c75a683c9e6b2b8f4c576b8be76f6b..7143fa4c1dedd5d790a5e56388e1a9e574cd8ffe 100644
--- a/third_party/WebKit/Source/bindings/core/v8/WindowProxy.h
+++ b/third_party/WebKit/Source/bindings/core/v8/WindowProxy.h
@@ -151,6 +151,7 @@ class WindowProxy : public GarbageCollectedFinalized<WindowProxy> {
 
   void ClearForClose();
   void ClearForNavigation();
+  void ClearForSwap();
 
   CORE_EXPORT v8::Local<v8::Object> GlobalProxyIfNotDetached();
   v8::Local<v8::Object> ReleaseGlobalProxy();
@@ -162,6 +163,8 @@ class WindowProxy : public GarbageCollectedFinalized<WindowProxy> {
 
   virtual bool IsLocal() const { return false; }
 
+  enum FrameReuseStatus { kFrameWillNotBeReused, kFrameWillBeReused };
+
  protected:
   // Lifecycle represents the following four states.
   //
@@ -227,7 +230,7 @@ class WindowProxy : public GarbageCollectedFinalized<WindowProxy> {
 
   virtual void Initialize() = 0;
 
-  virtual void DisposeContext(Lifecycle next_status) = 0;
+  virtual void DisposeContext(Lifecycle next_status, FrameReuseStatus) = 0;
 
   WARN_UNUSED_RESULT v8::Local<v8::Object> AssociateWithWrapper(
       DOMWindow*,