Validate finiteness of HTMLMediaElement properties.

Source/core/html/HTMLMediaElement.h

 /*
  * Copyright (C) 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 110 matching lines @@
     enum ReadyState { HAVE_NOTHING, HAVE_METADATA, HAVE_CURRENT_DATA, HAVE_FUTURE_DATA, HAVE_ENOUGH_DATA };
     ReadyState readyState() const;
     bool seeking() const;
 
     // playback state
     virtual double currentTime() const OVERRIDE FINAL;
     virtual void setCurrentTime(double, ExceptionState&) OVERRIDE FINAL;
     virtual double duration() const OVERRIDE FINAL;
     bool paused() const;
     double defaultPlaybackRate() const;
-    void setDefaultPlaybackRate(double);
+    void setDefaultPlaybackRate(double, ExceptionState&);
     double playbackRate() const;
-    void setPlaybackRate(double);
+    void setPlaybackRate(double, ExceptionState&);
     void updatePlaybackRate();
     PassRefPtr<TimeRanges> played();
     PassRefPtr<TimeRanges> seekable() const;
     bool ended() const;
     bool autoplay() const;
     bool loop() const;
     void setLoop(bool b);
     void play();
     void pause();
 
@@ skipping 240 matching lines @@
     void updatePlayState();
     bool potentiallyPlaying() const;
     bool endedPlayback() const;
     bool stoppedDueToErrors() const;
     bool pausedForUserInteraction() const;
     bool couldPlayIfEnoughData() const;
 
     // Pauses playback without changing any states or generating events
     void setPausedInternal(bool);
 
-    void setPlaybackRateInternal(double);
-
     void setShouldDelayLoadEvent(bool);
     void invalidateCachedTime();
     void refreshCachedTime() const;
 
     bool hasMediaControls() const;
     bool createMediaControls();
     void configureMediaControls();
 
     void prepareMediaFragmentURI();
     void applyMediaFragmentURI();
@@ skipping 149 matching lines @@
 inline bool isHTMLMediaElement(const HTMLElement& element)
 {
     return isHTMLAudioElement(element) || isHTMLVideoElement(element);
 }
 
 DEFINE_HTMLELEMENT_TYPE_CASTS_WITH_FUNCTION(HTMLMediaElement);
 
 } //namespace
 
 #endif