Remove dead code related to media device enumerations and monitoring.

chrome/browser/media/webrtc/media_stream_devices_controller.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 "chrome/browser/media/webrtc/media_stream_devices_controller.h"
 
 #include <map>
 #include <utility>
 
 #include "base/callback_helpers.h"
@@ skipping 405 matching lines @@
                                           get_default_video_device, &devices);
       }
       break;
     }
     case content::MEDIA_DEVICE_ACCESS: {
       // Get the default devices for the request.
       MediaCaptureDevicesDispatcher::GetInstance()->GetDefaultDevicesForProfile(
           profile_, audio_allowed, video_allowed, &devices);
       break;
     }
-    case content::MEDIA_ENUMERATE_DEVICES: {
-      // Do nothing.
-      NOTREACHED();
-      break;
-    }
   }  // switch
 
   if (audio_allowed) {
     HostContentSettingsMapFactory::GetForProfile(profile_)
         ->UpdateLastUsageByPattern(
             ContentSettingsPattern::FromURLNoWildcard(request_.security_origin),
             ContentSettingsPattern::Wildcard(),
             CONTENT_SETTINGS_TYPE_MEDIASTREAM_MIC);
   }
   if (video_allowed) {
@@ skipping 187 matching lines @@
   if (android_permission_blocked)
     return false;
 
   // Don't approve device requests if the tab was hidden.
   // TODO(qinmin): Add a test for this. http://crbug.com/396869.
   // TODO(raymes): Shouldn't this apply to all permissions not just audio/video?
   return web_contents_->GetRenderWidgetHostView()->IsShowing();
 #endif
   return true;
 }