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

content/renderer/media/media_stream_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/media_stream_video_source.h"
 
 #include <algorithm>
 #include <limits>
 #include <string>
 
@@ skipping 25 matching lines @@
   MediaStreamVideoSource::kMinWidth,
   MediaStreamVideoSource::kMaxHeight,
   MediaStreamVideoSource::kMinHeight,
   MediaStreamVideoSource::kMaxFrameRate,
   MediaStreamVideoSource::kMinFrameRate,
 };
 
 const int MediaStreamVideoSource::kDefaultWidth = 640;
 const int MediaStreamVideoSource::kDefaultHeight = 480;
 const int MediaStreamVideoSource::kDefaultFrameRate = 30;
+const int MediaStreamVideoSource::kUnknownFrameRate = 0;
 
 namespace {
 
 // Google-specific key prefix. Constraints with this prefix are ignored if they
 // are unknown.
 const char kGooglePrefix[] = "goog";
 
 // Returns true if |constraint| has mandatory constraints.
 bool HasMandatoryConstraints(const blink::WebMediaConstraints& constraints) {
   blink::WebVector<blink::WebMediaConstraint> mandatory_constraints;
@@ skipping 570 matching lines @@
     : track(track),
       frame_callback(frame_callback),
       constraints(constraints),
       callback(callback) {
 }
 
 MediaStreamVideoSource::RequestedConstraints::~RequestedConstraints() {
 }
 
 }  // namespace content