Removing `preference` field from `cricket::Codec`.

webrtc/media/base/videoengine_unittest.h

 /*
  *  Copyright (c) 2014 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 133 matching lines @@
     channel_->SetSource(kSsrc + 2, video_capturer_2_.get());
   }
   virtual void TearDown() {
     channel_.reset();
   }
   bool SetDefaultCodec() {
     return SetOneCodec(DefaultCodec());
   }
 
   bool SetOneCodec(int pt, const char* name, int w, int h, int fr) {
-    return SetOneCodec(cricket::VideoCodec(pt, name, w, h, fr, 0));
+    return SetOneCodec(cricket::VideoCodec(pt, name, w, h, fr));
   }
   bool SetOneCodec(const cricket::VideoCodec& codec) {
     cricket::VideoFormat capture_format(codec.width, codec.height,
         cricket::VideoFormat::FpsToInterval(codec.framerate),
         cricket::FOURCC_I420);
 
     if (video_capturer_) {
       EXPECT_EQ(cricket::CS_RUNNING, video_capturer_->Start(capture_format));
     }
     if (video_capturer_2_) {
@@ skipping 912 matching lines @@
   std::unique_ptr<C> channel_;
   cricket::FakeNetworkInterface network_interface_;
   cricket::FakeVideoRenderer renderer_;
   cricket::VideoMediaChannel::Error media_error_;
 
   // Used by test cases where 2 streams are run on the same channel.
   cricket::FakeVideoRenderer renderer2_;
 };
 
 #endif  // WEBRTC_MEDIA_BASE_VIDEOENGINE_UNITTEST_H_  NOLINT