cc: Add readback and forced draw states to the Scheduler

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 "base/basictypes.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 107 matching lines @@
   // Notifies frame-rate smoothness preference. If true, all non-critical
   // processing should be stopped, or lowered in priority.
   virtual void UpdateSmoothnessTakesPriority(bool prefer_smoothness) {}
 
   // Requests a BeginFrame notification from the output surface. The
   // notification will be delivered by calling
   // OutputSurfaceClient::BeginFrame until the callback is disabled.
   virtual void SetNeedsBeginFrame(bool enable);
 
   bool HasClient() { return !!client_; }
+  bool IsLost() { return context_is_lost_; }
 
  protected:
   // Synchronously initialize context3d and enter hardware mode.
   // This can only supported in threaded compositing mode.
   // |offscreen_context_provider| should match what is returned by
   // LayerTreeClient::OffscreenContextProviderForCompositorThread.
   bool InitializeAndSetContext3d(
       scoped_refptr<ContextProvider> context_provider,
       scoped_refptr<ContextProvider> offscreen_context_provider);
   void ReleaseGL();
 
   void PostSwapBuffersComplete();
 
   struct cc::OutputSurface::Capabilities capabilities_;
   scoped_refptr<ContextProvider> context_provider_;
   scoped_ptr<cc::SoftwareOutputDevice> software_device_;
+  bool context_is_lost_;
   bool has_gl_discard_backbuffer_;
   bool has_swap_buffers_complete_callback_;
   gfx::Size surface_size_;
   float device_scale_factor_;
   base::WeakPtrFactory<OutputSurface> weak_ptr_factory_;
 
   // The FrameRateController is deprecated.
   // Platforms should move to native BeginFrames instead.
   void OnVSyncParametersChanged(base::TimeTicks timebase,
                                 base::TimeDelta interval);
@@ skipping 39 matching lines @@
   // check_for_retroactive_begin_frame_pending_ is used to avoid posting
   // redundant checks for a retroactive BeginFrame.
   bool check_for_retroactive_begin_frame_pending_;
 
   DISALLOW_COPY_AND_ASSIGN(OutputSurface);
 };
 
 }  // namespace cc
 
 #endif  // CC_OUTPUT_OUTPUT_SURFACE_H_