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

chrome/browser/ui/webui/tracing_ui.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/ui/webui/tracing_ui.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/file_util.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/string_number_conversions.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/select_file_dialog.h"
 #include "chrome/browser/ui/webui/chrome_web_ui_data_source.h"
 #include "chrome/common/chrome_version_info.h"
 #include "chrome/common/url_constants.h"
 #include "content/browser/gpu/gpu_data_manager.h"
 #include "content/browser/renderer_host/render_view_host.h"
 #include "content/browser/tab_contents/tab_contents_view.h"
 #include "content/browser/trace_controller.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/web_contents.h"
+#include "content/public/browser/web_ui_message_handler.h"
 #include "grit/browser_resources.h"
 #include "grit/generated_resources.h"
 #include "ui/base/l10n/l10n_util.h"
 
 using content::BrowserThread;
 using content::WebContents;
+using content::WebUIMessageHandler;
 
 namespace {
 
 ChromeWebUIDataSource* CreateTracingHTMLSource() {
   ChromeWebUIDataSource* source =
       new ChromeWebUIDataSource(chrome::kChromeUITracingHost);
 
   source->set_json_path("strings.js");
   source->add_resource_path("tracing.js", IDR_TRACING_JS);
   source->set_default_resource(IDR_TRACING_HTML);
@@ skipping 366 matching lines @@
 //
 ////////////////////////////////////////////////////////////////////////////////
 
 TracingUI::TracingUI(WebContents* contents) : ChromeWebUI(contents) {
   AddMessageHandler(new TracingMessageHandler());
 
   // Set up the chrome://tracing/ source.
   Profile::FromBrowserContext(contents->GetBrowserContext())->
       GetChromeURLDataManager()->AddDataSource(CreateTracingHTMLSource());
 }