Make CommandBuffer::Flush asynchronous, and add CommandBuffer::FlushSync with former semantics.

chrome/plugin/command_buffer_stub.cc

 // Copyright (c) 2009 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.
 
 #include "base/callback.h"
 #include "base/scoped_open_process.h"
 #include "base/shared_memory.h"
 #include "chrome/common/gpu_messages.h"
 #include "chrome/common/plugin_messages.h"
 #include "chrome/plugin/command_buffer_stub.h"
@@ skipping 122 matching lines @@
   *state = command_buffer_->GetState();
 }
 
 void CommandBufferStub::OnAsyncGetState() {
   gpu::CommandBuffer::State state = command_buffer_->GetState();
   Send(new GpuCommandBufferMsg_UpdateState(route_id_, state));
 }
 
 void CommandBufferStub::OnFlush(int32 put_offset,
                                 gpu::CommandBuffer::State* state) {
-  *state = command_buffer_->Flush(put_offset);
+  *state = command_buffer_->FlushSync(put_offset);
 }
 
 void CommandBufferStub::OnAsyncFlush(int32 put_offset) {
-  gpu::CommandBuffer::State state = command_buffer_->Flush(put_offset);
+  gpu::CommandBuffer::State state = command_buffer_->FlushSync(put_offset);
   Send(new GpuCommandBufferMsg_UpdateState(route_id_, state));
 }
 
 void CommandBufferStub::OnCreateTransferBuffer(int32 size, int32* id) {
   *id = command_buffer_->CreateTransferBuffer(size);
 }
 
 void CommandBufferStub::OnDestroyTransferBuffer(int32 id) {
   command_buffer_->DestroyTransferBuffer(id);
 }
@@ skipping 80 matching lines @@
   Send(new PluginHostMsg_AllocTransportDIB(plugin_host_route_id_,
                                            size,
                                            dib_handle));
 }
 
 void CommandBufferStub::FreeTransportDIB(TransportDIB::Id dib_id) {
   Send(new PluginHostMsg_FreeTransportDIB(plugin_host_route_id_,
                                           dib_id));
 }
 #endif