Move a bunch of content\common code into the content namespace.

content/common/gpu/media/vaapi_video_decode_accelerator.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 "base/bind.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
 #include "base/stl_util.h"
 #include "base/string_util.h"
 #include "base/synchronization/waitable_event.h"
 #include "gpu/command_buffer/service/gpu_switches.h"
 #include "content/public/common/content_switches.h"
 #include "content/common/gpu/gpu_channel.h"
 #include "content/common/gpu/media/vaapi_video_decode_accelerator.h"
 #include "media/base/bind_to_loop.h"
 #include "media/video/picture.h"
 #include "third_party/libva/va/va.h"
 #include "ui/gl/gl_bindings.h"
 
+namespace content {
+
 #define RETURN_AND_NOTIFY_ON_FAILURE(result, log, error_code, ret)  \
   do {                                                              \
     if (!(result)) {                                                \
       DVLOG(1) << log;                                              \
       NotifyError(error_code);                                      \
       return ret;                                                   \
     }                                                               \
   } while (0)
 
-using content::VaapiH264Decoder;
-
 VaapiVideoDecodeAccelerator::InputBuffer::InputBuffer() : id(0), size(0) {
 }
 
 VaapiVideoDecodeAccelerator::InputBuffer::~InputBuffer() {
 }
 
 void VaapiVideoDecodeAccelerator::NotifyError(Error error) {
   if (message_loop_ != MessageLoop::current()) {
     DCHECK_EQ(decoder_thread_.message_loop(), MessageLoop::current());
     message_loop_->PostTask(FROM_HERE, base::Bind(
@@ skipping 552 matching lines @@
 
 // static
 void VaapiVideoDecodeAccelerator::PreSandboxInitialization() {
   VaapiH264Decoder::PreSandboxInitialization();
 }
 
 // static
 bool VaapiVideoDecodeAccelerator::PostSandboxInitialization() {
   return VaapiH264Decoder::PostSandboxInitialization();
 }
+
+}  // namespace content