[Cast] In Audio/VideoSender, drop frames when too-long a duration is in-flight.

media/cast/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.
 
 component("cast") {
   deps = [
     ":sender",
     ":receiver",
   ]
 }
@@ skipping 104 matching lines @@
     "sender/audio_sender.h",
     "sender/audio_sender.cc",
     "sender/congestion_control.h",
     "sender/congestion_control.cc",
     "sender/external_video_encoder.h",
     "sender/external_video_encoder.cc",
     "sender/fake_software_video_encoder.h",
     "sender/fake_software_video_encoder.cc",
     "sender/frame_sender.cc",
     "sender/frame_sender.h",
-    "sender/rtp_timestamp_helper.cc",
-    "sender/rtp_timestamp_helper.h",
     "sender/software_video_encoder.h",
     "sender/video_encoder.h",
     "sender/video_encoder_impl.h",
     "sender/video_encoder_impl.cc",
     "sender/video_sender.h",
     "sender/video_sender.cc",
 #    "sender/vp8_encoder.cc",
 #    "sender/vp8_encoder.h",
   ]
 
@@ skipping 177 matching lines @@
   sources = [
     "test/utility/udp_proxy_main.cc",
   ]
 
   deps = [
     ":test_support",
     "//base",
     "//net",
   ]
 }