Introduce the ENABLE_BROWSER_CDMS macro.

media/media.gyp

 # 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.
 
 {
   'variables': {
     'chromium_code': 1,
     # Override to dynamically link the cras (ChromeOS audio) library.
     'use_cras%': 0,
     # Option e.g. for Linux distributions to link pulseaudio directly
@@ skipping 593 matching lines @@
             'defines': [
               'MEDIA_DISABLE_LIBVPX',
             ],
           },
           # Exclude the sources that depend on libvpx.
           'sources!': [
             'filters/vpx_video_decoder.cc',
             'filters/vpx_video_decoder.h',
           ],
         }],
+        ['enable_browser_cdms==1', {
+          'sources': [
+            'base/browser_cdm.cc',
+            'base/browser_cdm.h',
+            'base/browser_cdm_factory.h',
+          ],
+        }],
         ['OS=="android"', {
           'dependencies': [
             'media_android_jni_headers',
             'player_android',
             'video_capture_android_jni_headers',
           ],
           'sources': [
             'base/media.cc',
             'base/media.h',
             'base/media_stub.cc',
@@ skipping 967 matching lines @@
             'base/android/media_player_bridge.h',
             'base/android/media_player_listener.cc',
             'base/android/media_player_listener.h',
             'base/android/media_source_player.cc',
             'base/android/media_source_player.h',
             'base/android/video_decoder_job.cc',
             'base/android/video_decoder_job.h',
             'base/android/webaudio_media_codec_bridge.cc',
             'base/android/webaudio_media_codec_bridge.h',
             'base/android/webaudio_media_codec_info.h',
-            'base/browser_cdm.cc',
-            'base/browser_cdm.h',
-            'base/browser_cdm_factory.h',
           ],
           'dependencies': [
             '../base/base.gyp:base',
             '../third_party/widevine/cdm/widevine_cdm.gyp:widevine_cdm_version_h',
             '../ui/gl/gl.gyp:gl',
             '../url/url.gyp:url_lib',
             'media_android_jni_headers',
           ],
           'include_dirs': [
             # Needed by media_drm_bridge.cc.
@@ skipping 77 matching lines @@
                   ],
                 }],
               ],
             }],
           ],
         },
       ],
     }],
   ],
 }