Browser side changes for software compositing

content/renderer/gpu/compositor_output_surface.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/gpu/compositor_output_surface.h"
 
 #include "base/command_line.h"
 #include "base/message_loop_proxy.h"
 #include "cc/output/compositor_frame.h"
 #include "cc/output/compositor_frame_ack.h"
 #include "cc/output/output_surface_client.h"
 #include "content/common/view_messages.h"
 #include "content/public/common/content_switches.h"
 #include "content/renderer/render_thread_impl.h"
 #include "ipc/ipc_forwarding_message_filter.h"
 #include "ipc/ipc_sync_channel.h"
 #include "ipc/ipc_sync_message_filter.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebGraphicsContext3D.h"
 
 #if defined(OS_ANDROID)
 // TODO(epenner): Move thread priorities to base. (crbug.com/170549)
 #include <sys/resource.h>
 #endif
 
-using cc::CompositorFrame;
-using cc::SoftwareOutputDevice;
 using WebKit::WebGraphicsContext3D;
 
 namespace {
 // There are several compositor surfaces in a process, but they share the same
 // compositor thread, so we use a simple int here to track prefer-smoothness.
 int g_prefer_smoothness_count = 0;
 } // namespace
 
 namespace content {
 
@@ skipping 124 matching lines @@
   // If this is the last surface to stop preferring smoothness,
   // Reset the main thread's priority to the default.
   if (prefers_smoothness_ == true &&
       --g_prefer_smoothness_count == 0) {
     SetThreadsPriorityToDefault(main_thread_id_);
   }
   prefers_smoothness_ = prefers_smoothness;
 }
 
 }  // namespace content