Componentize EncryptedMediaMessageFilter and rename it CdmMessageFilter.

chrome/chrome_common.gypi

 # Copyright (c) 2013 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.
 
 {
   'targets': [
     {
       'target_name': 'common',
       'type': 'static_library',
       'variables': {
@@ skipping 93 matching lines @@
         'common/content_settings_pattern.cc',
         'common/content_settings_pattern.h',
         'common/content_settings_pattern_parser.cc',
         'common/content_settings_pattern_parser.h',
         'common/content_settings_types.h',
         'common/crash_keys.cc',
         'common/crash_keys.h',
         'common/custom_handlers/protocol_handler.cc',
         'common/custom_handlers/protocol_handler.h',
         'common/descriptors_android.h',
-        'common/encrypted_media_messages_android.h',
         'common/extensions/api/bluetooth/bluetooth_manifest_data.cc',
         'common/extensions/api/bluetooth/bluetooth_manifest_data.h',
         'common/extensions/api/bluetooth/bluetooth_manifest_handler.cc',
         'common/extensions/api/bluetooth/bluetooth_manifest_handler.h',
         'common/extensions/api/bluetooth/bluetooth_manifest_permission.cc',
         'common/extensions/api/bluetooth/bluetooth_manifest_permission.h',
         'common/extensions/api/commands/commands_handler.cc',
         'common/extensions/api/commands/commands_handler.h',
         'common/extensions/api/extension_action/action_info.cc',
         'common/extensions/api/extension_action/action_info.h',
@@ skipping 560 matching lines @@
         'common/metrics/proto/permuted_entropy_cache.proto',
       ],
       'variables': {
         'proto_in_dir': 'common/metrics/proto',
         'proto_out_dir': 'chrome/common/metrics/proto',
       },
       'includes': [ '../build/protoc.gypi' ],
     },
   ],
 }