[Chromecast] Allow targets in //chromecast to depend on //media/mojo/clients.

media/mojo/clients/BUILD.gn

 # 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.
 
 # Implementations of media C++ interfaces using corresponding mojo services.
 source_set("clients") {
   visibility = [
+    "//chromecast/*",
     "//content/renderer",
 
     # TODO(xhwang): Only allow //media/mojo:media_mojo_unittests
     "//media/mojo:*",
 
     # TODO(xhwang): Only allow //media/mojo/services:media_mojo_shell_unittests
     "//media/mojo/services:*",
 
     "//media/test/*",
   ]
@@ skipping 29 matching lines @@
     "//mojo/public/cpp/system",
     "//services/shell/public/interfaces",
   ]
 
   deps = [
     "//media/mojo/common",
     "//mojo/common",
     "//services/shell/public/cpp",
   ]
 }