Extract minimal RenderViewHost interface for embedders, leaving

chrome/browser/favicon/favicon_tab_helper.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/favicon/favicon_tab_helper.h"
 
 #include "chrome/browser/favicon/favicon_handler.h"
 #include "chrome/browser/history/history.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/common/chrome_constants.h"
@@ skipping 124 matching lines @@
     touch_icon_handler_->OnUpdateFaviconURL(page_id, candidates);
 }
 
 NavigationEntry* FaviconTabHelper::GetActiveEntry() {
   return web_contents()->GetController().GetActiveEntry();
 }
 
 void FaviconTabHelper::StartDownload(int id, const GURL& url, int image_size) {
   RenderViewHost* host = web_contents()->GetRenderViewHost();
   host->Send(new IconMsg_DownloadFavicon(
-                 host->routing_id(), id, url, image_size));
+                 host->GetRoutingID(), id, url, image_size));
 }
 
 void FaviconTabHelper::NotifyFaviconUpdated() {
   content::NotificationService::current()->Notify(
       chrome::NOTIFICATION_FAVICON_UPDATED,
       content::Source<WebContents>(web_contents()),
       content::NotificationService::NoDetails());
   web_contents()->NotifyNavigationStateChanged(content::INVALIDATE_TYPE_TAB);
 }
 
@@ skipping 28 matching lines @@
 
 void FaviconTabHelper::OnDidDownloadFavicon(int id,
                                             const GURL& image_url,
                                             bool errored,
                                             const SkBitmap& image) {
   gfx::Image favicon(new SkBitmap(image));
   favicon_handler_->OnDidDownloadFavicon(id, image_url, errored, favicon);
   if (touch_icon_handler_.get())
     touch_icon_handler_->OnDidDownloadFavicon(id, image_url, errored, favicon);
 }