gpu: Thread-safe command buffer state lookup.

content/renderer/pepper/ppb_graphics_3d_impl.cc

 // 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.
 
 #include "content/renderer/pepper/ppb_graphics_3d_impl.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/feature_list.h"
 #include "base/location.h"
@@ skipping 99 matching lines @@
 }
 
 PP_Bool PPB_Graphics3D_Impl::Flush(int32_t put_offset) {
   GetCommandBuffer()->Flush(put_offset);
   return PP_TRUE;
 }
 
 gpu::CommandBuffer::State PPB_Graphics3D_Impl::WaitForTokenInRange(
     int32_t start,
     int32_t end) {
-  GetCommandBuffer()->WaitForTokenInRange(start, end);
-  return GetCommandBuffer()->GetLastState();
+  return GetCommandBuffer()->WaitForTokenInRange(start, end);
 }
 
 gpu::CommandBuffer::State PPB_Graphics3D_Impl::WaitForGetOffsetInRange(
     int32_t start,
     int32_t end) {
-  GetCommandBuffer()->WaitForGetOffsetInRange(start, end);
-  return GetCommandBuffer()->GetLastState();
+  return GetCommandBuffer()->WaitForGetOffsetInRange(start, end);
 }
 
 void PPB_Graphics3D_Impl::EnsureWorkVisible() {
   command_buffer_->EnsureWorkVisible();
 }
 
 void PPB_Graphics3D_Impl::TakeFrontBuffer() {
   if (!taken_front_buffer_.IsZero()) {
     DLOG(ERROR)
         << "TakeFrontBuffer should only be called once before DoSwapBuffers";
@@ skipping 219 matching lines @@
   if (!mailboxes_to_reuse_.empty()) {
     gpu::Mailbox mailbox = mailboxes_to_reuse_.back();
     mailboxes_to_reuse_.pop_back();
     return mailbox;
   }
 
   return gpu::Mailbox::Generate();
 }
 
 }  // namespace content