Factor out AudioOutputDelegate from AudioRendererHost.

content/browser/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/features.gni")
 import("//build/config/ui.gni")
 import("//media/media_options.gni")
 import("//ppapi/features/features.gni")
 import("//printing/features/features.gni")
 import("//third_party/WebKit/public/public_features.gni")
@@ skipping 273 matching lines @@
     "appcache/appcache_storage_impl.cc",
     "appcache/appcache_storage_impl.h",
     "appcache/appcache_update_job.cc",
     "appcache/appcache_update_job.h",
     "appcache/appcache_url_request_job.cc",
     "appcache/appcache_url_request_job.h",
     "appcache/appcache_working_set.cc",
     "appcache/appcache_working_set.h",
     "appcache/chrome_appcache_service.cc",
     "appcache/chrome_appcache_service.h",
+    "audio_device_thread.cc",
+    "audio_device_thread.h",
     "background_sync/background_sync_context.cc",
     "background_sync/background_sync_context.h",
     "background_sync/background_sync_manager.cc",
     "background_sync/background_sync_manager.h",
     "background_sync/background_sync_metrics.cc",
     "background_sync/background_sync_metrics.h",
     "background_sync/background_sync_network_observer.cc",
     "background_sync/background_sync_network_observer.h",
     "background_sync/background_sync_registration.cc",
     "background_sync/background_sync_registration.h",
@@ skipping 776 matching lines @@
     "renderer_host/media/audio_input_debug_writer.cc",
     "renderer_host/media/audio_input_debug_writer.h",
     "renderer_host/media/audio_input_device_manager.cc",
     "renderer_host/media/audio_input_device_manager.h",
     "renderer_host/media/audio_input_renderer_host.cc",
     "renderer_host/media/audio_input_renderer_host.h",
     "renderer_host/media/audio_input_sync_writer.cc",
     "renderer_host/media/audio_input_sync_writer.h",
     "renderer_host/media/audio_output_authorization_handler.cc",
     "renderer_host/media/audio_output_authorization_handler.h",
+    "renderer_host/media/audio_output_delegate.cc",
+    "renderer_host/media/audio_output_delegate.h",
     "renderer_host/media/audio_renderer_host.cc",
     "renderer_host/media/audio_renderer_host.h",
     "renderer_host/media/audio_sync_reader.cc",
     "renderer_host/media/audio_sync_reader.h",
     "renderer_host/media/media_capture_devices_impl.cc",
     "renderer_host/media/media_capture_devices_impl.h",
     "renderer_host/media/media_devices_dispatcher_host.cc",
     "renderer_host/media/media_devices_dispatcher_host.h",
     "renderer_host/media/media_devices_manager.cc",
     "renderer_host/media/media_devices_manager.h",
@@ skipping 875 matching lines @@
   if (!is_component_build) {
     public_deps = [
       ":browser",
     ]
   } else {
     public_deps = [
       "//third_party/leveldatabase",
     ]
   }
 }