Move WebUIMessageHandler to its own file in the public directory and put it in the content namesp...

chrome/browser/printing/print_preview_tab_controller.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 "chrome/browser/printing/print_preview_tab_controller.h"
 
 #include <algorithm>
 #include <memory>
 #include <string>
 #include <vector>
@@ skipping 20 matching lines @@
 #include "content/browser/renderer_host/render_view_host.h"
 #include "content/browser/tab_contents/tab_contents.h"
 #include "content/public/browser/navigation_details.h"
 #include "content/public/browser/navigation_entry.h"
 #include "content/public/browser/notification_details.h"
 #include "content/public/browser/notification_source.h"
 #include "content/public/browser/notification_types.h"
 #include "webkit/plugins/webplugininfo.h"
 
 using content::WebContents;
+using content::WebUIMessageHandler;
 
 namespace {
 
 void EnableInternalPDFPluginForTab(TabContentsWrapper* preview_tab) {
   // Always enable the internal PDF plugin for the print preview page.
   ChromePluginServiceFilter::GetInstance()->OverridePluginForTab(
         preview_tab->tab_contents()->GetRenderProcessHost()->GetID(),
         preview_tab->tab_contents()->GetRenderViewHost()->routing_id(),
         GURL(),
         ASCIIToUTF16(chrome::ChromeContentClient::kPDFPluginName));
@@ skipping 432 matching lines @@
   PrintPreviewUI* print_preview_ui =
       static_cast<PrintPreviewUI*>(preview_tab->tab_contents()->GetWebUI());
   if (print_preview_ui)
     print_preview_ui->OnTabDestroyed();
 
   preview_tab_map_.erase(preview_tab);
   RemoveObservers(preview_tab);
 }
 
 }  // namespace printing