Run draw callback immediately if no Display is damaged.

content/browser/compositor/onscreen_display_client.h

 // Copyright 2014 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_BROWSER_COMPOSITOR_ONSCREEN_DISPLAY_CLIENT_H_
 #define CONTENT_BROWSER_COMPOSITOR_ONSCREEN_DISPLAY_CLIENT_H_
 
 #include "cc/surfaces/display_client.h"
 
 #include "base/memory/ref_counted.h"
@@ skipping 28 matching lines @@
 
   // cc::DisplayClient implementation.
   void DisplayDamaged() override;
   void DidSwapBuffers() override;
   void DidSwapBuffersComplete() override;
   void CommitVSyncParameters(base::TimeTicks timebase,
                              base::TimeDelta interval) override;
   void OutputSurfaceLost() override;
   void SetMemoryPolicy(const cc::ManagedMemoryPolicy& policy) override;
 
+  bool output_surface_lost() { return output_surface_lost_; }
+
  private:
   void ScheduleDraw();
   void Draw();
 
   scoped_ptr<cc::OutputSurface> output_surface_;
   scoped_ptr<cc::Display> display_;
   scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
   SurfaceDisplayOutputSurface* surface_display_output_surface_;
   bool scheduled_draw_;
   bool output_surface_lost_;
   // True if a draw should be scheduled, but it's hit the limit on max frames
   // pending.
   bool deferred_draw_;
   int pending_frames_;
 
   base::WeakPtrFactory<OnscreenDisplayClient> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(OnscreenDisplayClient);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_COMPOSITOR_ONSCREEN_DISPLAY_CLIENT_H_