Print Preview: Display a throbber when the user requests the system print

chrome/browser/tab_contents/render_view_context_menu.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 <algorithm>
 #include <set>
 
 #include "chrome/browser/tab_contents/render_view_context_menu.h"
 
 #include "base/command_line.h"
@@ skipping 1366 matching lines @@
     case IDC_PRINT:
       if (params_.media_type == WebContextMenuData::MediaTypeNone) {
         TabContentsWrapper* tab_contents_wrapper =
             TabContentsWrapper::GetCurrentWrapperForContents(
                 source_tab_contents_);
         if (!tab_contents_wrapper)
           break;
         if (switches::IsPrintPreviewEnabled())
           tab_contents_wrapper->print_view_manager()->PrintPreviewNow();
         else
-          tab_contents_wrapper->print_view_manager()->PrintNow();
+          tab_contents_wrapper->print_view_manager()->PrintNow(NULL);
       } else {
         rvh->Send(new PrintMsg_PrintNodeUnderContextMenu(rvh->routing_id()));
       }
       break;
 
     case IDC_VIEW_SOURCE:
       source_tab_contents_->ViewSource();
       break;
 
     case IDC_CONTENT_CONTEXT_INSPECTELEMENT:
@@ skipping 240 matching lines @@
       g_browser_process->clipboard());
 }
 
 void RenderViewContextMenu::MediaPlayerActionAt(
     const gfx::Point& location,
     const WebMediaPlayerAction& action) {
   RenderViewHost* rvh = source_tab_contents_->render_view_host();
   rvh->Send(new ViewMsg_MediaPlayerActionAt(
       rvh->routing_id(), location, action));
 }