VideoAdapter: Drop frames based on actual fps instead of expected fps

webrtc/media/base/videocapturer.h

 /*
  *  Copyright (c) 2010 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 228 matching lines @@
   // order of preference, that are expected by the media engine.
   virtual bool GetPreferredFourccs(std::vector<uint32_t>* fourccs) = 0;
 
   // mutators to set private attributes
   void SetId(const std::string& id) {
     id_ = id;
   }
 
   void SetCaptureFormat(const VideoFormat* format) {
     capture_format_.reset(format ? new VideoFormat(*format) : NULL);
-    if (capture_format_) {
-      ASSERT(capture_format_->interval > 0 &&
-             "Capture format expected to have positive interval.");
-      video_adapter_.SetExpectedInputFrameInterval(capture_format_->interval);
-    }
   }
 
   void SetSupportedFormats(const std::vector<VideoFormat>& formats);
   VideoFrameFactory* frame_factory() { return frame_factory_.get(); }
 
  private:
   void Construct();
   // Get the distance between the desired format and the supported format.
   // Return the max distance if they mismatch. See the implementation for
   // details.
@@ skipping 36 matching lines @@
 
   // Whether capturer should apply rotation to the frame before signaling it.
   bool apply_rotation_;
 
   RTC_DISALLOW_COPY_AND_ASSIGN(VideoCapturer);
 };
 
 }  // namespace cricket
 
 #endif  // WEBRTC_MEDIA_BASE_VIDEOCAPTURER_H_