Add AudioTrackRecorder for audio component of MediaStream recording.

content/test/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/chrome_build.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//build_overrides/v8.gni")
 import("//media/media_options.gni")
@@ skipping 602 matching lines @@
       deps += [ "//third_party/webrtc/modules/desktop_capture" ]
     }
 
     if (is_chromeos) {
       sources +=
           [ "../browser/media/capture/desktop_capture_device_aura_unittest.cc" ]
     }
 
     if (is_android) {
       sources -= [
+        "../renderer/media/audio_track_recorder_unittest.cc",
         "../renderer/media/media_recorder_handler_unittest.cc",
         "../renderer/media/video_track_recorder_unittest.cc",
       ]
     }
   }
 
   if (enable_web_speech) {
     sources +=
         rebase_path(content_tests_gypi_values.content_unittests_speech_sources,
                     ".",
@@ skipping 183 matching lines @@
     "//gpu/blink",
     "//testing/gtest",
     "//third_party/WebKit/public:blink",
     "//ui/base",
     "//ui/gfx",
     "//ui/gfx/geometry",
     "//ui/gl",
     "//ui/gl:test_support",
   ]
 }