[Not for review] Discardable memory emulation

content/renderer/render_thread_impl.h

Index: content/renderer/render_thread_impl.h
diff --git a/content/renderer/render_thread_impl.h b/content/renderer/render_thread_impl.h
index ae011484c3d7d00fc551017944cfae5c1a79a48f..82f98a826ea3c6ab129e4ebbd8fb2adc73694dd8 100644
--- a/content/renderer/render_thread_impl.h
+++ b/content/renderer/render_thread_impl.h
@@ -83,6 +83,9 @@ class MediaStreamDependencyFactory;
 class P2PSocketDispatcher;
 class PeerConnectionTracker;
 class RendererWebKitPlatformSupportImpl;
+#if !defined(OS_ANDROID) && !defined(OS_MACOSX)
+class RenderProcessDiscardableMemoryProvider;
+#endif
 class RenderProcessObserver;
 class VideoCaptureImplManager;
 class WebDatabaseObserverImpl;
@@ -418,6 +421,10 @@ class CONTENT_EXPORT RenderThreadImpl : public RenderThread,
   scoped_ptr<base::win::ScopedCOMInitializer> initialize_com_;
 #endif
 
+#if !defined(OS_ANDROID) && !defined(OS_MACOSX)
+  scoped_ptr<RenderProcessDiscardableMemoryProvider> discardable_provider_;
+#endif
+
   // The count of RenderWidgets running through this thread.
   int widget_count_;