Split BrowserThread into public API and private implementation, step 1.

content/browser/browser_process_sub_thread.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/browser/browser_process_sub_thread.h"
 
 #include "build/build_config.h"
 #include "content/browser/notification_service_impl.h"
 
 #if defined(OS_WIN)
 #include <Objbase.h>
 #endif
 
+namespace content {
+
 BrowserProcessSubThread::BrowserProcessSubThread(BrowserThread::ID identifier)
-      : BrowserThread(identifier) {}
+    : BrowserThreadImpl(identifier) {}
 
 BrowserProcessSubThread::~BrowserProcessSubThread() {
   // We cannot rely on our base class to stop the thread since we want our
   // CleanUp function to run.
   Stop();
 }
 
 void BrowserProcessSubThread::Init() {
 #if defined(OS_WIN)
   // Initializes the COM library on the current thread.
   CoInitialize(NULL);
 #endif
 
   notification_service_ = new NotificationServiceImpl;
 }
 
 void BrowserProcessSubThread::CleanUp() {
   delete notification_service_;
   notification_service_ = NULL;
 
 #if defined(OS_WIN)
   // Closes the COM library on the current thread. CoInitialize must
   // be balanced by a corresponding call to CoUninitialize.
   CoUninitialize();
 #endif
 }
+
+}  // namespace content