Allow MediaStream constraints to specify higher than 30 FPS tab capture.

content/renderer/media/media_stream_video_capturer_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_CAPTURER_SOURCE_H_
 #define CONTENT_RENDERER_MEDIA_MEDIA_STREAM_VIDEO_CAPTURER_SOURCE_H_
 
 #include "base/callback.h"
 #include "base/gtest_prod_util.h"
 #include "base/message_loop/message_loop_proxy.h"
@@ skipping 10 matching lines @@
 // This is a render thread only object.
 class CONTENT_EXPORT VideoCapturerDelegate
     : public base::RefCountedThreadSafe<VideoCapturerDelegate> {
  public:
   typedef base::Callback<void(bool running)> RunningCallback;
 
   explicit VideoCapturerDelegate(
       const StreamDeviceInfo& device_info);
 
   // Collects the formats that can currently be used.
-  // |max_requested_height| and |max_requested_width| is used by Tab and Screen
-  // capture to decide what resolution to generate.
-  // |callback| is triggered when the formats have been collected.
+  // |max_requested_height|, |max_requested_width|, and
+  // |max_requested_frame_rate| is used by Tab and Screen capture to decide what
+  // resolution/framerate to generate. |callback| is triggered when the formats
+  // have been collected.
   virtual void GetCurrentSupportedFormats(
       int max_requested_width,
       int max_requested_height,
+      double max_requested_frame_rate,
       const VideoCaptureDeviceFormatsCB& callback);
 
   // Starts capturing frames using the resolution in |params|.
   // |new_frame_callback| is triggered when a new video frame is available.
   // If capturing is started successfully then |running_callback| will be
   // called with a parameter of true.
   // If capturing fails to start or stopped due to an external event then
   // |running_callback| will be called with a parameter of false.
   virtual void StartCapture(
       const media::VideoCaptureParams& params,
@@ skipping 48 matching lines @@
       const SourceStoppedCallback& stop_callback,
       const scoped_refptr<VideoCapturerDelegate>& delegate);
 
   virtual ~MediaStreamVideoCapturerSource();
 
  protected:
   // Implements MediaStreamVideoSource.
   virtual void GetCurrentSupportedFormats(
       int max_requested_width,
       int max_requested_height,
+      double max_requested_frame_rate,
       const VideoCaptureDeviceFormatsCB& callback) OVERRIDE;
 
   virtual void StartSourceImpl(
       const media::VideoCaptureParams& params,
       const VideoCaptureDeliverFrameCB& frame_callback) OVERRIDE;
 
   virtual void StopSourceImpl() OVERRIDE;
 
  private:
   // The delegate that provides video frames.
   scoped_refptr<VideoCapturerDelegate> delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaStreamVideoCapturerSource);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_MEDIA_STREAM_VIDEO_CAPTURER_SOURCE_H_