Make the Linux build not fail because of an unhandled enum.

Review URL: http://codereview.chromium.org/6258002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@71369 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/tab_contents/render_view_context_menu.cc

@@ -399,6 +399,8 @@ void RenderViewContextMenu::InitMenu() {
     case WebContextMenuData::MediaTypeAudio:
       AppendAudioItems();
       break;
+    default:
+      break;
   }
 
   if (params_.is_editable)