Delete unused file mediacommon.h.

webrtc/media/BUILD.gn

 # Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
 #
 # Use of this source code is governed by a BSD-style license
 # that can be found in the LICENSE file in the root of the source
 # tree. An additional intellectual property rights grant can be found
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
 import("//build/config/linux/pkg_config.gni")
 import("../build/webrtc.gni")
@@ skipping 38 matching lines @@
   sources = [
     "base/adaptedvideotracksource.cc",
     "base/adaptedvideotracksource.h",
     "base/audiosource.h",
     "base/codec.cc",
     "base/codec.h",
     "base/cryptoparams.h",
     "base/device.h",
     "base/hybriddataengine.h",
     "base/mediachannel.h",
-    "base/mediacommon.h",
     "base/mediaconstants.cc",
     "base/mediaconstants.h",
     "base/mediaengine.cc",
     "base/mediaengine.h",
     "base/rtpdataengine.cc",
     "base/rtpdataengine.h",
     "base/rtpdump.cc",
     "base/rtpdump.h",
     "base/rtputils.cc",
     "base/rtputils.h",
@@ skipping 279 matching lines @@
     deps += [
       # TODO(kjellander): Move as part of work in bugs.webrtc.org/4243.
       ":rtc_media",
       ":rtc_unittest_main",
       "../audio",
       "../base:rtc_base_tests_utils",
       "../system_wrappers:metrics_default",
     ]
   }
 }