Propagate googScreencastMinBitrate constraint to webrtc's RTCConfiguration.

content/renderer/media/rtc_peer_connection_handler.cc

 // Copyright (c) 2012 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.
 
 #include "content/renderer/media/rtc_peer_connection_handler.h"
 
 #include <string.h>
 
 #include <string>
 #include <utility>
@@ skipping 283 matching lines @@
       &blink::WebMediaTrackConstraintSet::googEnableVideoSuspendBelowMinBitrate,
       &the_value)) {
     configuration->set_suspend_below_min_bitrate(the_value);
   }
 
   if (!GetConstraintValueAsBoolean(
       constraints, &blink::WebMediaTrackConstraintSet::enableRtpDataChannels,
       &configuration->enable_rtp_data_channel)) {
     configuration->enable_rtp_data_channel = false;
   }
-  // TODO: Special treatment for screencast min bitrate, since it's an integer.
-  // if (FindConstraint(constraints,
-  //                   MediaConstraintsInterface::kScreencastMinBitrate,
-  //                   &configuration->screencast_min_bitrate, NULL)) {
-  //  configuration->override_screencast_min_bitrate = true;
-  // }
-  // Note: If an optional is not present, webrtc decides on its own
-  // what the value should be.
+  int rate;
+  if (GetConstraintValueAsInteger(
+          constraints,
+          &blink::WebMediaTrackConstraintSet::googScreencastMinBitrate,
+          &rate)) {
+    configuration->screencast_min_bitrate = rtc::Optional<int>(rate);
+  }
   configuration->combined_audio_video_bwe = ConstraintToOptional(
       constraints,
       &blink::WebMediaTrackConstraintSet::googCombinedAudioVideoBwe);
   configuration->enable_dtls_srtp = ConstraintToOptional(
       constraints, &blink::WebMediaTrackConstraintSet::enableDtlsSrtp);
 }
 
 class SessionDescriptionRequestTracker {
  public:
   SessionDescriptionRequestTracker(
@@ skipping 1474 matching lines @@
 }
 
 void RTCPeerConnectionHandler::ResetUMAStats() {
   DCHECK(thread_checker_.CalledOnValidThread());
   num_local_candidates_ipv6_ = 0;
   num_local_candidates_ipv4_ = 0;
   ice_connection_checking_start_ = base::TimeTicks();
   memset(ice_state_seen_, 0, sizeof(ice_state_seen_));
 }
 }  // namespace content