Switch to double for time calculations using playback rate.

media/blink/buffered_data_source.h

 // Copyright 2013 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 MEDIA_BLINK_BUFFERED_DATA_SOURCE_H_
 #define MEDIA_BLINK_BUFFERED_DATA_SOURCE_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 82 matching lines @@
 
   // Cancels initialization, any pending loaders, and any pending read calls
   // from the demuxer. The caller is expected to release its reference to this
   // object and never call it again.
   //
   // Method called on the render thread.
   void Abort();
 
   // Notifies changes in playback state for controlling media buffering
   // behavior.
-  void MediaPlaybackRateChanged(float playback_rate);
+  void MediaPlaybackRateChanged(double playback_rate);
   void MediaIsPlaying();
   void MediaIsPaused();
   bool media_has_played() const { return media_has_played_; }
 
   // Returns true if the resource is local.
   bool assume_fully_buffered() { return !url_.SchemeIsHTTPOrHTTPS(); }
 
   // Cancels any open network connections once reaching the deferred state for
   // preload=metadata, non-streaming resources that have not started playback.
   // If already deferred, connections will be immediately closed.
@@ skipping 108 matching lines @@
   bool media_has_played_;
 
   // This variable holds the value of the preload attribute for the video
   // element.
   Preload preload_;
 
   // Bitrate of the content, 0 if unknown.
   int bitrate_;
 
   // Current playback rate.
-  float playback_rate_;
+  double playback_rate_;
 
   scoped_refptr<MediaLog> media_log_;
 
   // Host object to report buffered byte range changes to.
   BufferedDataSourceHost* host_;
 
   DownloadingCB downloading_cb_;
 
   // Disallow rebinding WeakReference ownership to a different thread by keeping
   // a persistent reference. This avoids problems with the thread-safety of
   // reaching into this class from multiple threads to attain a WeakPtr.
   base::WeakPtr<BufferedDataSource> weak_ptr_;
   base::WeakPtrFactory<BufferedDataSource> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(BufferedDataSource);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BLINK_BUFFERED_DATA_SOURCE_H_