Switch to double for time calculations using playback rate.

media/renderers/audio_renderer_impl.h

 // Copyright (c) 2012 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.
 
 // Audio rendering unit utilizing an AudioRendererSink to output data.
 //
 // This class lives inside three threads during it's lifetime, namely:
 // 1. Render thread
 //    Where the object is created.
 // 2. Media thread (provided via constructor)
@@ skipping 50 matching lines @@
       const scoped_refptr<base::SingleThreadTaskRunner>& task_runner,
       AudioRendererSink* sink,
       ScopedVector<AudioDecoder> decoders,
       const AudioHardwareConfig& hardware_config,
       const scoped_refptr<MediaLog>& media_log);
   ~AudioRendererImpl() override;
 
   // TimeSource implementation.
   void StartTicking() override;
   void StopTicking() override;
-  void SetPlaybackRate(float rate) override;
+  void SetPlaybackRate(double rate) override;
   void SetMediaTime(base::TimeDelta time) override;
   base::TimeDelta CurrentMediaTime() override;
   base::TimeTicks GetWallClockTime(base::TimeDelta time) override;
 
   // AudioRenderer implementation.
   void Initialize(DemuxerStream* stream,
                   const PipelineStatusCB& init_cb,
                   const SetDecryptorReadyCB& set_decryptor_ready_cb,
                   const StatisticsCB& statistics_cb,
                   const BufferingStateCB& buffering_state_cb,
@@ skipping 184 matching lines @@
 
   // NOTE: Weak pointers must be invalidated before all other member variables.
   base::WeakPtrFactory<AudioRendererImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioRendererImpl);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_RENDERERS_AUDIO_RENDERER_IMPL_H_