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

content/plugin/plugin_main.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 "build/build_config.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
 #endif
 
@@ skipping 11 matching lines @@
 
 #if defined(OS_WIN)
 #include "base/win/scoped_com_initializer.h"
 #include "content/public/common/injection_test_win.h"
 #include "sandbox/win/src/sandbox.h"
 #elif defined(OS_POSIX) && !defined(OS_MACOSX)
 #include "base/global_descriptors_posix.h"
 #include "ipc/ipc_descriptors.h"
 #endif
 
+namespace content {
+
 #if defined(OS_MACOSX)
 // Removes our Carbon library interposing from the environment so that it
 // doesn't carry into any processes that plugins might start.
 void TrimInterposeEnvironment();
 
 // Initializes the global Cocoa application object.
 void InitializeChromeApplication();
 #elif defined(OS_LINUX)
 // Work around an unimplemented instruction in 64-bit Flash.
 void WorkaroundFlashLAHF();
 #endif
 
 // main() routine for running as the plugin process.
-int PluginMain(const content::MainFunctionParams& parameters) {
+int PluginMain(const MainFunctionParams& parameters) {
   // The main thread of the plugin services UI.
 #if defined(OS_MACOSX)
 #if !defined(__LP64__)
   TrimInterposeEnvironment();
 #endif
   InitializeChromeApplication();
 #endif
   MessageLoop main_message_loop(MessageLoop::TYPE_UI);
   base::PlatformThread::SetName("CrPluginMain");
 
@@ skipping 17 matching lines @@
   }
 
   {
     ChildProcess plugin_process;
     plugin_process.set_main_thread(new PluginThread());
     MessageLoop::current()->Run();
   }
 
   return 0;
 }
+
+}  // namespace content