Drop frontbuffers with ui-use-gpu-process, synchronized with browser, decoupled from backbuffer dro…

content/common/gpu/image_transport_surface.h

 // Copyright (c) 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 CONTENT_COMMON_GPU_IMAGE_TRANSPORT_SURFACE_H_
 #define CONTENT_COMMON_GPU_IMAGE_TRANSPORT_SURFACE_H_
 
 #if defined(ENABLE_GPU)
 
 #include <vector>
@@ skipping 44 matching lines @@
 // making sure outside events reach the ImageTransportSurface and
 // allowing the ImageTransportSurface to send events to the outside world.
 
 class ImageTransportSurface {
  public:
   ImageTransportSurface();
 
   virtual void OnBufferPresented(uint32 sync_point) = 0;
   virtual void OnResizeViewACK() = 0;
   virtual void OnResize(gfx::Size size) = 0;
+  virtual void OnSetFrontSurfaceIsProtected(bool is_protected,
+                                            uint32 protection_state_id);
 
   // Creates the appropriate surface depending on the GL implementation.
   static scoped_refptr<gfx::GLSurface>
       CreateSurface(GpuChannelManager* manager,
                     GpuCommandBufferStub* stub,
                     const gfx::GLSurfaceHandle& handle);
 
   virtual gfx::Size GetSize() = 0;
 
  protected:
@@ skipping 55 matching lines @@
 
   GpuChannelManager* manager() const { return manager_; }
 
  private:
   gpu::GpuScheduler* Scheduler();
   gpu::gles2::GLES2Decoder* Decoder();
 
   // IPC::Message handlers.
   void OnBufferPresented(uint32 sync_point);
   void OnResizeViewACK();
+  void OnSetFrontSurfaceIsProtected(bool is_protected,
+                                    uint32 protection_state_id);
 
   // Backbuffer resize callback.
   void Resize(gfx::Size size);
 
   // Weak pointers that point to objects that outlive this helper.
   ImageTransportSurface* surface_;
   GpuChannelManager* manager_;
 
   base::WeakPtr<GpuCommandBufferStub> stub_;
   int32 route_id_;
@@ skipping 34 matching lines @@
   gfx::Size new_size_;
   bool transport_;
   bool did_set_swap_interval_;
 
   DISALLOW_COPY_AND_ASSIGN(PassThroughImageTransportSurface);
 };
 
 #endif  // defined(ENABLE_GPU)
 
 #endif  // CONTENT_COMMON_GPU_IMAGE_TRANSPORT_SURFACE_H_