Ensure swap is performed before informing compositor.

ppapi/proxy/ppb_graphics_3d_proxy.cc

 // 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.
 
 #include "ppapi/proxy/ppb_graphics_3d_proxy.h"
 
 #include "gpu/command_buffer/client/gles2_implementation.h"
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/proxy/enter_proxy.h"
 #include "ppapi/proxy/plugin_dispatcher.h"
@@ skipping 364 matching lines @@
 PP_Graphics3DTrustedState Graphics3D::FlushSyncFast(int32_t put_offset,
                                                     int32_t last_known_get) {
   return GetErrorState();
 }
 
 gpu::CommandBuffer* Graphics3D::GetCommandBuffer() {
   return command_buffer_.get();
 }
 
 int32 Graphics3D::DoSwapBuffers() {
+  gles2_impl()->SwapBuffers();
   IPC::Message* msg = new PpapiHostMsg_PPBGraphics3D_SwapBuffers(
       API_ID_PPB_GRAPHICS_3D, host_resource());
   msg->set_unblock(true);
   PluginDispatcher::GetForResource(this)->Send(msg);
 
-  gles2_impl()->SwapBuffers();
   return PP_OK_COMPLETIONPENDING;
 }
 
 PPB_Graphics3D_Proxy::PPB_Graphics3D_Proxy(Dispatcher* dispatcher)
     : InterfaceProxy(dispatcher),
       callback_factory_(ALLOW_THIS_IN_INITIALIZER_LIST(this)) {
 }
 
 PPB_Graphics3D_Proxy::~PPB_Graphics3D_Proxy() {
 }
@@ skipping 182 matching lines @@
 void PPB_Graphics3D_Proxy::SendSwapBuffersACKToPlugin(
     int32_t result,
     const HostResource& context) {
   dispatcher()->Send(new PpapiMsg_PPBGraphics3D_SwapBuffersACK(
       API_ID_PPB_GRAPHICS_3D, context, result));
 }
 
 }  // namespace proxy
 }  // namespace ppapi