Remove task.h and finish base::Bind() migration.

content/renderer/gpu/command_buffer_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 "content/renderer/gpu/command_buffer_proxy.h"
 
+#include "base/callback.h"
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
 #include "base/process_util.h"
 #include "base/shared_memory.h"
 #include "base/stl_util.h"
-#include "base/task.h"
 #include "content/common/child_process_messages.h"
 #include "content/common/child_thread.h"
 #include "content/common/gpu/gpu_messages.h"
 #include "content/common/plugin_messages.h"
 #include "content/common/view_messages.h"
 #include "content/renderer/gpu/gpu_channel_host.h"
 #include "content/renderer/plugin_channel_host.h"
 #include "gpu/command_buffer/common/cmd_buffer_common.h"
 #include "ui/gfx/size.h"
 
@@ skipping 390 matching lines @@
   delete msg;
   return false;
 }
 
 void CommandBufferProxy::OnUpdateState(const gpu::CommandBuffer::State& state) {
   // Handle wraparound. It works as long as we don't have more than 2B state
   // updates in flight across which reordering occurs.
   if (state.generation - last_state_.generation < 0x80000000U)
     last_state_ = state;
 }