Chromecast: use variable internal GYP variable consistently.

chromecast/media/media.gyp

 # Copyright 2014 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': {
     'chromecast_branding%': 'Chromium',
   },
   'targets': [
     {
       'target_name': 'media_base',
       'type': '<(component)',
       'dependencies': [
         '../../base/base.gyp:base',
         '../../crypto/crypto.gyp:crypto',
         '../../third_party/widevine/cdm/widevine_cdm.gyp:widevine_cdm_version_h',
       ],
       'sources': [
         'base/decrypt_context.cc',
         'base/decrypt_context.h',
         'base/decrypt_context_clearkey.cc',
         'base/decrypt_context_clearkey.h',
         'base/key_systems_common.cc',
         'base/key_systems_common.h',
       ],
       'conditions': [
         ['chromecast_branding=="Chrome"', {
           'dependencies': [
-            'internal/chromecast_internal.gyp:media_base_internal',
+            '<(cast_internal_gyp):media_base_internal',
           ],
         }, {
           'sources': [
             'base/key_systems_common_simple.cc',
           ],
         }],
       ],
     },
     {
       'target_name': 'cma_base',
@@ skipping 159 matching lines @@
         'cma/test/media_component_device_feeder_for_test.h',
         'cma/test/mock_frame_consumer.cc',
         'cma/test/mock_frame_consumer.h',
         'cma/test/mock_frame_provider.cc',
         'cma/test/mock_frame_provider.h',
         'cma/test/run_all_unittests.cc',
       ],
     },
   ],
 }