Extract media code from RenderFrameImpl

content/renderer/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.
 
 import("//build/config/chromecast_build.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//build/split_static_library.gni")
 import("//content/common/features.gni")
 import("//media/media_options.gni")
@@ skipping 219 matching lines @@
     "media/cdm/ppapi_decryptor.cc",
     "media/cdm/ppapi_decryptor.h",
     "media/cdm/render_cdm_factory.cc",
     "media/cdm/render_cdm_factory.h",
     "media/media_permission_dispatcher.cc",
     "media/media_permission_dispatcher.h",
     "media/midi_message_filter.cc",
     "media/midi_message_filter.h",
     "media/render_media_client.cc",
     "media/render_media_client.h",
+    "media/render_media_helper.cc",
+    "media/render_media_helper.h",
     "media/render_media_log.cc",
     "media/render_media_log.h",
     "media/renderer_gpu_video_accelerator_factories.cc",
     "media/renderer_gpu_video_accelerator_factories.h",
     "media/renderer_webaudiodevice_impl.cc",
     "media/renderer_webaudiodevice_impl.h",
     "media/renderer_webmediaplayer_delegate.cc",
     "media/renderer_webmediaplayer_delegate.h",
     "media/renderer_webmidiaccessor_impl.cc",
     "media/renderer_webmidiaccessor_impl.h",
@@ skipping 734 matching lines @@
     # For the defines in mojo_media_config.
     public_configs = [ "//media/mojo/services:mojo_media_config" ]
   }
 
   if (!is_component_build) {
     public_deps = [
       ":renderer",
     ]
   }
 }