Switch PrintViewManager, PrintPreviewMessageHandler to use WebContentsUserData.

chrome/browser/tab_contents/render_view_context_menu.cc

 // Copyright (c) 2012 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 <algorithm>
 #include <set>
 #include <utility>
 
 #include "chrome/browser/tab_contents/render_view_context_menu.h"
 
@@ skipping 1692 matching lines @@
       break;
 
     case IDC_RELOAD:
       // Prevent the modal "Resubmit form post" dialog from appearing in the
       // context of an external context menu.
       source_web_contents_->GetController().Reload(!external_);
       break;
 
     case IDC_PRINT:
       if (params_.media_type == WebContextMenuData::MediaTypeNone) {
-        TabContents* tab_contents =
-            TabContents::FromWebContents(source_web_contents_);
-        if (!tab_contents)
+        printing::PrintViewManager* print_view_manager =
+            printing::PrintViewManager::FromWebContents(source_web_contents_);
+        if (!print_view_manager)
           break;
         if (profile_->GetPrefs()->GetBoolean(prefs::kPrintPreviewDisabled)) {
-          tab_contents->print_view_manager()->PrintNow();
+          print_view_manager->PrintNow();
         } else {
-          tab_contents->print_view_manager()->PrintPreviewNow();
+          print_view_manager->PrintPreviewNow();
         }
       } else {
         rvh->Send(new PrintMsg_PrintNodeUnderContextMenu(rvh->GetRoutingID()));
       }
       break;
 
     case IDC_VIEW_SOURCE:
       source_web_contents_->ViewSource();
       break;
 
@@ skipping 293 matching lines @@
   source_web_contents_->GetRenderViewHost()->
       ExecuteMediaPlayerActionAtLocation(location, action);
 }
 
 void RenderViewContextMenu::PluginActionAt(
     const gfx::Point& location,
     const WebPluginAction& action) {
   source_web_contents_->GetRenderViewHost()->
       ExecutePluginActionAtLocation(location, action);
 }