[Chromecast] Enable browser media tests to work on internal builds

chromecast/chromecast_tests.gypi

Index: chromecast/chromecast_tests.gypi
diff --git a/chromecast/chromecast_tests.gypi b/chromecast/chromecast_tests.gypi
index 3084ad903ab00da08703fdcd459696e0bde2d33b..f5c43050a9266690f721a70a2615a4d02c6e960d 100644
--- a/chromecast/chromecast_tests.gypi
+++ b/chromecast/chromecast_tests.gypi
@@ -328,6 +328,7 @@
           'sources': [
             'browser/test/chromecast_browser_test.cc',
             'browser/test/chromecast_browser_test.h',
+            'browser/test/chromecast_browser_test_helper.h',
             'browser/test/chromecast_browser_test_runner.cc',
           ],
         },  # end of target 'cast_shell_test_support'
@@ -353,6 +354,13 @@
                 # linking dynamically against dummy implementation.
                 'media/media.gyp:libcast_media_1.0_default_core',
               ],
+              'sources': [
+                'browser/test/chromecast_browser_test_helper_default.cc',
+              ],
+            },{
+              'dependencies': [
+                'internal/chromecast_internal.gyp:cast_shell_browser_test_helper_internal',
+              ],
             }],
           ],
         },