Add CdmService to keep track of CDMs

content/content_browser.gypi

 # 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.
 
 {
   'dependencies': [
     '../base/base.gyp:base_static',
     '../cc/cc.gyp:cc',
     '../cc/cc.gyp:cc_surfaces',
     '../components/components.gyp:display_compositor',
@@ skipping 1060 matching lines @@
       'browser/media/capture/web_contents_tracker.cc',
       'browser/media/capture/web_contents_tracker.h',
       'browser/media/capture/web_contents_video_capture_device.cc',
       'browser/media/capture/web_contents_video_capture_device.h',
       'browser/media/capture/window_activity_tracker.cc',
       'browser/media/capture/window_activity_tracker.h',
       'browser/media/capture/window_activity_tracker_aura.cc',
       'browser/media/capture/window_activity_tracker_aura.h',
       'browser/media/capture/window_activity_tracker_mac.h',
       'browser/media/capture/window_activity_tracker_mac.mm',
+      'browser/media/cdm_service_impl.cc',
+      'browser/media/cdm_service_impl.h',
       'browser/media/media_internals.cc',
       'browser/media/media_internals.h',
       'browser/media/media_internals_handler.cc',
       'browser/media/media_internals_handler.h',
       'browser/media/media_internals_proxy.cc',
       'browser/media/media_internals_proxy.h',
       'browser/media/media_internals_ui.cc',
       'browser/media/media_internals_ui.h',
       'browser/media/media_web_contents_observer.cc',
       'browser/media/media_web_contents_observer.h',
@@ skipping 1112 matching lines @@
     ['enable_webvr==1 and OS=="android"', {
       'sources': [
         'browser/vr/android/cardboard/cardboard_vr_device.cc',
         'browser/vr/android/cardboard/cardboard_vr_device.h',
         'browser/vr/android/cardboard/cardboard_vr_device_provider.cc',
         'browser/vr/android/cardboard/cardboard_vr_device_provider.h',
       ],
     }],
   ],
 }