Delete MediaController class, move Call ownership to PeerConnection.

webrtc/api/BUILD.gn

 # Copyright (c) 2015 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("../webrtc.gni")
 if (is_android) {
@@ skipping 30 matching lines @@
   cflags = []
   sources = [
     "datachannel.h",
     "datachannelinterface.h",
     "dtmfsenderinterface.h",
     "jsep.h",
     "jsepicecandidate.h",
     "jsepsessiondescription.h",
     "mediaconstraintsinterface.cc",
     "mediaconstraintsinterface.h",
-    "mediacontroller.h",
     "mediastream.h",
     "mediastreaminterface.cc",
     "mediastreaminterface.h",
     "mediastreamproxy.h",
     "mediastreamtrack.h",
     "mediastreamtrackproxy.h",
     "mediatypes.cc",
     "mediatypes.h",
     "notifier.h",
     "peerconnectionfactoryproxy.h",
@@ skipping 200 matching lines @@
       suppressed_configs += [ "//build/config/clang:find_bad_constructs" ]
     }
 
     deps = [
       ":libjingle_peerconnection_api",
       ":ortc_api",
       "//webrtc/test:test_support",
     ]
   }
 }