Add utility set classes to support getUserMedia constraint proccessing.

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("//media/media_options.gni")
 import("//ppapi/features/features.gni")
@@ skipping 561 matching lines @@
       "media/media_stream_audio_processor_options.cc",
       "media/media_stream_audio_processor_options.h",
       "media/media_stream_audio_source.cc",
       "media/media_stream_audio_source.h",
       "media/media_stream_audio_track.cc",
       "media/media_stream_audio_track.h",
       "media/media_stream_center.cc",
       "media/media_stream_center.h",
       "media/media_stream_constraints_util.cc",
       "media/media_stream_constraints_util.h",
+      "media/media_stream_constraints_util_sets.cc",
+      "media/media_stream_constraints_util_sets.h",
       "media/media_stream_constraints_util_video_device.cc",
       "media/media_stream_constraints_util_video_device.h",
       "media/media_stream_dispatcher.cc",
       "media/media_stream_dispatcher.h",
       "media/media_stream_dispatcher_eventhandler.h",
       "media/media_stream_registry_interface.h",
       "media/media_stream_renderer_factory_impl.cc",
       "media/media_stream_renderer_factory_impl.h",
       "media/media_stream_source.cc",
       "media/media_stream_source.h",
@@ skipping 351 matching lines @@
     # For the defines in mojo_media_config.
     public_configs = [ "//media/mojo/services:mojo_media_config" ]
   }
 
   if (!is_component_build) {
     public_deps = [
       ":renderer",
     ]
   }
 }