media: Fix widevine_cdm_manifest target

third_party/widevine/cdm/widevine_cdm.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': {
     # Allow widevinecdmadapter to be built in Chromium.
     'variables': {
       'enable_widevine%': 0,
     },
@@ skipping 152 matching lines @@
       'copies': [{
         'destination': '<(SHARED_INTERMEDIATE_DIR)',
         'files': [ '<(widevine_cdm_version_h_file)' ],
       }],
     },
     {
       # GN version: //third_party/widevine/cdm:widevine_cdm_manifest
       'target_name': 'widevine_cdm_manifest',
       'type': 'none',
       'conditions': [
-        [ 'branding == "Chrome"', {
+        [ 'widevine_cdm_manifest_file != []', {
           'copies': [{
             'destination': '<(PRODUCT_DIR)/WidevineCdm',
             'files': [ '<(widevine_cdm_manifest_file)' ],
           }],
         }],
       ],
     },
     {
       # GN version: //third_party/widevine/cdm:widevinecdm
       'target_name': 'widevinecdm',
@@ skipping 49 matching lines @@
       'conditions': [
         [ 'branding == "Chrome" and OS == "linux"', {
           'dependencies': [
             '<(DEPTH)/third_party/widevine/test/license_server/license_server.gyp:test_license_server',
           ],
         }],
       ],
     },
   ],
 }