[Athena] Tempolarily exclude extensions API that are causing crash on Athena

chrome/browser/media/media_capture_devices_dispatcher.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/media_capture_devices_dispatcher.h"
 
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/metrics/field_trial.h"
 #include "base/prefs/pref_service.h"
@@ skipping 636 matching lines @@
 }
 
 void MediaCaptureDevicesDispatcher::ProcessTabCaptureAccessRequest(
     content::WebContents* web_contents,
     const content::MediaStreamRequest& request,
     const content::MediaResponseCallback& callback,
     const extensions::Extension* extension) {
   content::MediaStreamDevices devices;
   scoped_ptr<content::MediaStreamUI> ui;
 
-#if defined(ENABLE_EXTENSIONS)
+#if defined(ENABLE_EXTENSIONS) && !defined(USE_ATHENA)
   Profile* profile =
       Profile::FromBrowserContext(web_contents->GetBrowserContext());
   extensions::TabCaptureRegistry* tab_capture_registry =
       extensions::TabCaptureRegistry::Get(profile);
   if (!tab_capture_registry) {
     NOTREACHED();
     callback.Run(devices, content::MEDIA_DEVICE_INVALID_STATE, ui.Pass());
     return;
   }
   const bool tab_capture_allowed = tab_capture_registry->VerifyRequest(
@@ skipping 418 matching lines @@
 
 void MediaCaptureDevicesDispatcher::SetTestAudioCaptureDevices(
     const MediaStreamDevices& devices) {
   test_audio_devices_ = devices;
 }
 
 void MediaCaptureDevicesDispatcher::SetTestVideoCaptureDevices(
     const MediaStreamDevices& devices) {
   test_video_devices_ = devices;
 }