Motown: Define MediaRenderer and make it the way we identify renderers.

services/media/framework_ffmpeg/BUILD.gn

 #Copyright 2016 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.
 
 import("//build/module_args/mojo.gni")
 import("$mojo_sdk_root/mojo/public/mojo_sdk.gni")
 
 config("default_include_dirs") {
   include_dirs = [
     "//",
@@ skipping 29 matching lines @@
     "ffmpeg_formatting.h",
     "ffmpeg_init.cc",
     "ffmpeg_init.h",
     "ffmpeg_video_decoder.cc",
     "ffmpeg_video_decoder.h",
   ]
 
   deps = [
     "//base",
     "//mojo/common",
+    "//mojo/services/media/common/cpp",
     "//services/media/framework",
     "//services/util/cpp",
     "//third_party/ffmpeg",
   ]
 
   defines = [
     "FF_API_PIX_FMT_DESC=0",
     "FF_API_OLD_DECODE_AUDIO=0",
     "FF_API_DESTRUCT_PACKET=0",
     "FF_API_GET_BUFFER=0",
   ]
 
   configs -= [ "//build/config/compiler:default_include_dirs" ]
   configs += [ ":default_include_dirs" ]
 }