Validate finiteness of HTMLMediaElement properties.

Source/core/html/HTMLMediaElement.idl

 /*
  * Copyright (C) 2007, 2010, 2011, 2012 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 39 matching lines @@
     // ready state
     const unsigned short HAVE_NOTHING = 0;
     const unsigned short HAVE_METADATA = 1;
     const unsigned short HAVE_CURRENT_DATA = 2;
     const unsigned short HAVE_FUTURE_DATA = 3;
     const unsigned short HAVE_ENOUGH_DATA = 4;
     readonly attribute unsigned short readyState;
     readonly attribute boolean seeking;
 
     // playback state
+    // FIXME: generated bindings should check isfinite: http://crbug.com/354298
     [RaisesException=Setter] attribute double currentTime;
     readonly attribute double duration;
     readonly attribute boolean paused;
-    attribute double defaultPlaybackRate;
-    attribute double playbackRate;
+    [RaisesException=Setter] attribute double defaultPlaybackRate;
+    [RaisesException=Setter] attribute double playbackRate;
     readonly attribute TimeRanges played;
     readonly attribute TimeRanges seekable;
     readonly attribute boolean ended;
     [Reflect] attribute boolean autoplay;
     [Reflect] attribute boolean loop;
     void play();
     void pause();
 
     // media controller
     [Reflect] attribute DOMString mediaGroup;
@@ skipping 10 matching lines @@
     [RuntimeEnabled=VideoTrack, RaisesException] TextTrack addTextTrack(DOMString kind, optional DOMString label, optional DOMString language);
 
     // WebKit extensions
 
     // The number of bytes consumed by the media decoder.
     [MeasureAs=PrefixedAudioDecodedByteCount] readonly attribute unsigned long webkitAudioDecodedByteCount;
     [MeasureAs=PrefixedVideoDecodedByteCount] readonly attribute unsigned long webkitVideoDecodedByteCount;
 
     [Reflect, RuntimeEnabled=SubresourceIntegrity] attribute DOMString integrity;
 };