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

content/renderer/media/media_stream_video_source.h

 // 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.
 
 #ifndef CONTENT_RENDERER_MEDIA_MEDIA_STREAM_VIDEO_SOURCE_H_
 #define CONTENT_RENDERER_MEDIA_MEDIA_STREAM_VIDEO_SOURCE_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 63 matching lines @@
   static const char kMaxHeight[];  // maxHeight
   static const char kMinHeight[];  // minHeight
   static const char kMaxFrameRate[];  // maxFrameRate
   static const char kMinFrameRate[];  // minFrameRate
 
   // Default resolution. If no constraints are specified and the delegate
   // support it, this is the resolution that will be used.
   static const int kDefaultWidth;
   static const int kDefaultHeight;
   static const int kDefaultFrameRate;
+  static const int kUnknownFrameRate;
 
  protected:
   virtual void DoStopSource() OVERRIDE;
 
   // Sets ready state and notifies the ready state to all registered tracks.
   virtual void SetReadyState(blink::WebMediaStreamSource::ReadyState state);
 
   // Sets muted state and notifies it to all registered tracks.
   virtual void SetMutedState(bool state);
 
@@ skipping 82 matching lines @@
 
   // NOTE: Weak pointers must be invalidated before all other member variables.
   base::WeakPtrFactory<MediaStreamVideoSource> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaStreamVideoSource);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_MEDIA_STREAM_VIDEO_SOURCE_H_