Move content's a plugin, ppapi_plugin, utility, and worker subdirectories to the content namespace.

content/plugin/webplugin_accelerated_surface_proxy_mac.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.
 
 #import <OpenGL/OpenGL.h>
 
 #include "content/plugin/webplugin_accelerated_surface_proxy_mac.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "content/plugin/webplugin_proxy.h"
 #include "ui/base/ui_base_switches.h"
 #include "ui/surface/accelerated_surface_mac.h"
 #include "ui/surface/io_surface_support_mac.h"
 #include "ui/surface/transport_dib.h"
 
+namespace content {
+
 WebPluginAcceleratedSurfaceProxy* WebPluginAcceleratedSurfaceProxy::Create(
     WebPluginProxy* plugin_proxy,
     gfx::GpuPreference gpu_preference) {
   bool composited = !CommandLine::ForCurrentProcess()->HasSwitch(
       switches::kDisableCompositedCoreAnimationPlugins);
 
   // Require IOSurface support for drawing Core Animation plugins.
   if (composited && !IOSurfaceSupport::Initialize())
     return NULL;
 
@@ skipping 85 matching lines @@
     return;
 
   surface_->SwapBuffers();
   if (composited_) {
     plugin_proxy_->AcceleratedPluginSwappedIOSurface();
   } else {
     plugin_proxy_->AcceleratedFrameBuffersDidSwap(
         window_handle_, surface_->GetSurfaceId());
   }
 }
+
+}  // namespace content