Disable mute/unmute when media does not have an audio track.

webkit/glue/context_menu_client_impl.cc

 // Copyright (c) 2006-2009 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 "config.h"
 
 #include "base/compiler_specific.h"
 
 MSVC_PUSH_WARNING_LEVEL(0);
 #include "ContextMenu.h"
@@ skipping 189 matching lines @@
     }
     if (media_element->muted()) {
       media_params.player_state |= ContextMenuMediaParams::MUTED;
     }
     if (media_element->loop()) {
       media_params.player_state |= ContextMenuMediaParams::LOOP;
     }
     if (media_element->supportsSave()) {
       media_params.player_state |= ContextMenuMediaParams::CAN_SAVE;
     }
+
+    media_params.has_audio = media_element->hasAudio();
   }
 
   // If it's not a link, an image, a media element, or an image/media link,
   // show a selection menu or a more generic page menu.
   std::wstring selection_text_string;
   std::wstring misspelled_word_string;
   GURL frame_url;
   GURL page_url;
   std::string security_info;
 
@@ skipping 106 matching lines @@
 
 bool ContextMenuClientImpl::shouldIncludeInspectElementItem() {
     return false;  // TODO(jackson): Eventually include the inspector context menu item
 }
 
 #if defined(OS_MACOSX)
 void ContextMenuClientImpl::searchWithSpotlight() {
   // TODO(pinkerton): write this
 }
 #endif