Added CommandBuffer::GetLastError.

content/renderer/gpu/command_buffer_proxy.h

 // Copyright (c) 2011 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_RENDERER_GPU_COMMAND_BUFFER_PROXY_H_
 #define CONTENT_RENDERER_GPU_COMMAND_BUFFER_PROXY_H_
 #pragma once
 
 #if defined(ENABLE_GPU)
 
@@ skipping 73 matching lines @@
   // Sends an IPC message to create a GpuVideoDecodeAccelerator. Creates and
   // returns a pointer to a GpuVideoDecodeAcceleratorHost.
   // Returns NULL on failure to create the GpuVideoDecodeAcceleratorHost.
   // Note that the GpuVideoDecodeAccelerator may still fail to be created in
   // the GPU process, even if this returns non-NULL. In this case the client is
   // notified of an error later.
   scoped_refptr<GpuVideoDecodeAcceleratorHost> CreateVideoDecoder(
       media::VideoDecodeAccelerator::Profile profile,
       media::VideoDecodeAccelerator::Client* client);
 
+  // TODO(apatrick): this is a temporary optimization while skia is calling
+  // RendererGLContext::MakeCurrent prior to every GL call. It saves returning 6
+  // ints redundantly when only the error is needed for the CommandBufferProxy
+  // implementation.
+  virtual gpu::error::Error GetLastError() OVERRIDE;
+
  private:
   // Send an IPC message over the GPU channel. This is private to fully
   // encapsulate the channel; all callers of this function must explicitly
   // verify that the context has not been lost.
   bool Send(IPC::Message* msg);
 
   // Message handlers:
   void OnUpdateState(const gpu::CommandBuffer::State& state);
   void OnNotifyRepaint();
   void OnDestroyed(gpu::error::ContextLostReason reason);
@@ skipping 24 matching lines @@
   base::Closure notify_repaint_task_;
 
   base::Closure channel_error_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(CommandBufferProxy);
 };
 
 #endif  // ENABLE_GPU
 
 #endif  // CONTENT_RENDERER_GPU_COMMAND_BUFFER_PROXY_H_