Move PageTransition into content namespace. While I'm touching all these files, I've also updated...

content/shell/shell_browser_main.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/shell/shell_browser_main.h"
 
 #include "base/message_loop.h"
 #include "base/threading/thread.h"
 #include "base/threading/thread_restrictions.h"
 #include "content/browser/browser_process_sub_thread.h"
 #include "content/browser/download/download_file_manager.h"
 #include "content/browser/download/save_file_manager.h"
 #include "content/browser/renderer_host/resource_dispatcher_host.h"
-#include "content/common/page_transition_types.h"
 #include "content/shell/shell.h"
 #include "content/shell/shell_browser_context.h"
 #include "content/shell/shell_content_browser_client.h"
 #include "net/base/net_module.h"
 #include "ui/base/clipboard/clipboard.h"
 
 namespace content {
 
 ShellBrowserMainParts::ShellBrowserMainParts(
     const MainFunctionParams& parameters)
@@ skipping 62 matching lines @@
   return resource_dispatcher_host_.get();
 }
 
 ui::Clipboard* ShellBrowserMainParts::GetClipboard() {
   if (!clipboard_.get())
     clipboard_.reset(new ui::Clipboard());
   return clipboard_.get();
 }
 
 }  // namespace