Enable send-side BWE by default for video in call tests.

webrtc/modules/rtp_rtcp/source/rtcp_sender.cc

 /*
  *  Copyright (c) 2012 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.
  */
 
@@ skipping 1031 matching lines @@
     }
 
     Transport* const transport_;
     RtcEventLog* const event_log_;
     bool send_failure_;
     // TODO(terelius): We would like to
     // RTC_DISALLOW_IMPLICIT_CONSTRUCTORS(Sender);
     // but we can't because of an incorrect warning (C4822) in MVS 2013.
   } sender(transport_, event_log_);
 
+  {
+    rtc::CritScope lock(&critical_section_rtcp_sender_);
+    if (method_ == RtcpMode::kOff)
+      return false;

[brandtr, 2017/02/06 13:25:25]

Is this a bugfix? If so, consider mentioning it in the commit msg.

[stefan-webrtc, 2017/02/06 13:35:35]

Yes

+  }
+
   RTC_DCHECK_LE(max_packet_size_, IP_PACKET_SIZE);
   uint8_t buffer[IP_PACKET_SIZE];
   return packet.BuildExternalBuffer(buffer, max_packet_size_, &sender) &&
          !sender.send_failure_;
 }
 
 }  // namespace webrtc