Change VideoTrackAdapter to not drop frames if the source frame rate is known. Also change remote v…

content/renderer/media/webrtc/media_stream_remote_video_source.cc

 // 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.
 
 #include "content/renderer/media/webrtc/media_stream_remote_video_source.h"
 
 #include "base/bind.h"
 #include "base/callback_helpers.h"
 #include "base/location.h"
 #include "base/message_loop/message_loop_proxy.h"
@@ skipping 88 matching lines @@
         frame->GetVPlane(), frame->GetVPitch(), uv_rows, video_frame.get());
   }
 
   media::VideoPixelFormat pixel_format =
       (video_frame->format() == media::VideoFrame::YV12) ?
           media::PIXEL_FORMAT_YV12 : media::PIXEL_FORMAT_TEXTURE;
 
   media::VideoCaptureFormat format(
       gfx::Size(video_frame->natural_size().width(),
                 video_frame->natural_size().height()),
-                MediaStreamVideoSource::kDefaultFrameRate,
+                MediaStreamVideoSource::kUnknownFrameRate,
                 pixel_format);
 
   io_message_loop_->PostTask(
       FROM_HERE,
       base::Bind(&RemoteVideoSourceDelegate::DoRenderFrameOnIOThread,
                  this, video_frame, format));
 }
 
 void MediaStreamRemoteVideoSource::
 RemoteVideoSourceDelegate::DoRenderFrameOnIOThread(
@@ skipping 65 matching lines @@
         SetReadyState(blink::WebMediaStreamSource::ReadyStateEnded);
         break;
       default:
         NOTREACHED();
         break;
     }
   }
 }
 
 }  // namespace content