Encrypted Media: No NeedKey if --enable-encrypted-media is not set.

webkit/media/webkit_media.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.
 
 {
   'variables': {
     'conditions': [
       ['OS == "android" or OS == "ios"', {
         # Android and iOS don't use ffmpeg.
         'use_ffmpeg%': 0,
@@ skipping 11 matching lines @@
         '<(SHARED_INTERMEDIATE_DIR)',  # Needed by key_systems.cc.
       ],
       'dependencies': [
         '<(DEPTH)/base/base.gyp:base',
         '<(DEPTH)/base/third_party/dynamic_annotations/dynamic_annotations.gyp:dynamic_annotations',
         '<(DEPTH)/media/media.gyp:shared_memory_support',
         '<(DEPTH)/media/media.gyp:yuv_convert',
         '<(DEPTH)/skia/skia.gyp:skia',
         '<(DEPTH)/third_party/widevine/cdm/widevine_cdm.gyp:widevine_cdm_version_h',
       ],
+      'defines': [
+        'WEBKIT_MEDIA_IMPLEMENTATION',
+      ],
       'sources': [
         'android/audio_decoder_android.cc',
         'android/media_player_bridge_manager_impl.cc',
         'android/media_player_bridge_manager_impl.h',
         'android/stream_texture_factory_android.h',
         'android/webmediaplayer_android.cc',
         'android/webmediaplayer_android.h',
         'android/webmediaplayer_impl_android.cc',
         'android/webmediaplayer_impl_android.h',
         'android/webmediaplayer_in_process_android.cc',
@@ skipping 16 matching lines @@
         'crypto/key_systems.h',
         'crypto/ppapi_decryptor.cc',
         'crypto/ppapi_decryptor.h',
         'crypto/proxy_decryptor.cc',
         'crypto/proxy_decryptor.h',
         'filter_helpers.cc',
         'filter_helpers.h',
         'media_stream_audio_renderer.cc',
         'media_stream_audio_renderer.h',
         'media_stream_client.h',
+        'media_switches.cc',
+        'media_switches.h',
         'preload.h',
         'simple_video_frame_provider.cc',
         'simple_video_frame_provider.h',
         'video_frame_provider.cc',
         'video_frame_provider.h',
+        'webkit_media_export.h',
         'webmediaplayer_delegate.h',
         'webmediaplayer_impl.cc',
         'webmediaplayer_impl.h',
         'webmediaplayer_ms.cc',
         'webmediaplayer_ms.h',
         'webmediaplayer_proxy.cc',
         'webmediaplayer_proxy.h',
         'webmediaplayer_util.cc',
         'webmediaplayer_util.h',
         'webvideoframe_impl.cc',
@@ skipping 93 matching lines @@
               # Not to strip important symbols by -Wl,-dead_strip.
               '-Wl,-exported_symbol,_PPP_GetInterface',
               '-Wl,-exported_symbol,_PPP_InitializeModule',
               '-Wl,-exported_symbol,_PPP_ShutdownModule'
             ]},
         }],
       ],
     }
   ],
 }