Mac: Don't draw a cc::Surface while suspended

cc/output/output_surface.h

 // Copyright 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 CC_OUTPUT_OUTPUT_SURFACE_H_
 #define CC_OUTPUT_OUTPUT_SURFACE_H_
 
 #include <deque>
 
 #include "base/basictypes.h"
@@ skipping 138 matching lines @@
   // Support for a pull-model where draws are requested by the output surface.
   //
   // OutputSurface::Invalidate is called by the compositor to notify that
   // there's new content.
   virtual void Invalidate() {}
 
   // Updates the worker context provider's visibility, freeing GPU resources if
   // appropriate.
   virtual void SetWorkerContextShouldAggressivelyFreeResources(bool is_visible);
 
+  // If this returns true, then the surface will not attempt to draw.
+  virtual bool SurfaceIsSuspendForRecycle() const;
+
  protected:
   OutputSurfaceClient* client_;
 
   void PostSwapBuffersComplete();
 
   struct OutputSurface::Capabilities capabilities_;
   scoped_refptr<ContextProvider> context_provider_;
   scoped_refptr<ContextProvider> worker_context_provider_;
   scoped_ptr<SoftwareOutputDevice> software_device_;
   gfx::Size surface_size_;
@@ skipping 17 matching lines @@
   bool external_stencil_test_enabled_;
 
   base::WeakPtrFactory<OutputSurface> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(OutputSurface);
 };
 
 }  // namespace cc
 
 #endif  // CC_OUTPUT_OUTPUT_SURFACE_H_