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

chrome/browser/tab_contents/render_view_context_menu.cc

 // Copyright (c) 2010 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 "app/l10n_util.h"
@@ skipping 381 matching lines @@
       break;
     case WebContextMenuData::MediaTypeImage:
       AppendImageItems();
       break;
     case WebContextMenuData::MediaTypeVideo:
       AppendVideoItems();
       break;
     case WebContextMenuData::MediaTypeAudio:
       AppendAudioItems();
       break;
+    default:
+      break;
   }
 
   if (params_.is_editable)
     AppendEditableItems();
   else if (has_selection)
     AppendCopyItem();
 
   if (has_selection)
     AppendSearchProvider();
 
@@ skipping 1039 matching lines @@
       profile_->GetPrefs()->GetString(prefs::kAcceptLanguages),
       g_browser_process->clipboard());
 }
 
 void RenderViewContextMenu::MediaPlayerActionAt(
     const gfx::Point& location,
     const WebMediaPlayerAction& action) {
   source_tab_contents_->render_view_host()->MediaPlayerActionAt(
       location, action);
 }