Implement robustness strings in requestMediaKeySystemAccess().

media/base/android/browser_cdm_factory_android.cc

 // Copyright 2014 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 "media/base/android/browser_cdm_factory_android.h"
 
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "media/base/android/media_drm_bridge.h"
@@ skipping 16 matching lines @@
 
   scoped_ptr<MediaDrmBridge> cdm(MediaDrmBridge::Create(
       key_system, session_message_cb, session_closed_cb, session_error_cb,
       session_keys_change_cb, session_expiration_update_cb));
   if (!cdm) {
     NOTREACHED() << "MediaDrmBridge cannot be created for " << key_system;
     return scoped_ptr<BrowserCdm>();
   }
 
   // TODO(xhwang/ddorwin): Pass the security level from key system.
-  // http://crbug.com/459400
+  // http://crbug.com/467779
   if (key_system == kWidevineKeySystem) {
     MediaDrmBridge::SecurityLevel security_level =
         MediaDrmBridge::SECURITY_LEVEL_3;
     if (base::CommandLine::ForCurrentProcess()->HasSwitch(
             switches::kMediaDrmEnableNonCompositing)) {
       security_level = MediaDrmBridge::SECURITY_LEVEL_1;
     }
     if (!cdm->SetSecurityLevel(security_level)) {
       DVLOG(1) << "failed to set security level " << security_level;
       return scoped_ptr<BrowserCdm>();
     }
   } else {
     // Assume other key systems do not support full compositing.
     if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
             switches::kMediaDrmEnableNonCompositing)) {
       NOTREACHED() << key_system << " may require "
                    << switches::kMediaDrmEnableNonCompositing;
       return scoped_ptr<BrowserCdm>();
     }
   }
 
   return cdm.Pass();
 }
 
 }  // namespace media