Update WebKit idl files after chrome roll

third_party/WebCore/Modules/webaudio/PannerNode.idl

 /*
  * Copyright (C) 2010, Google 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 29 matching lines @@
     [CustomSetter] attribute DOMString panningModel;
 
     // Uses a 3D cartesian coordinate system 
     void setPosition(in float x, in float y, in float z);
     void setOrientation(in float x, in float y, in float z);
     void setVelocity(in float x, in float y, in float z);
 
     // Distance model
     [CustomSetter] attribute DOMString distanceModel;
 
-    attribute float refDistance;
-    attribute float maxDistance;
-    attribute float rolloffFactor;
+    attribute double refDistance;
+    attribute double maxDistance;
+    attribute double rolloffFactor;
 
     // Directional sound cone
-    attribute float coneInnerAngle;
-    attribute float coneOuterAngle;
-    attribute float coneOuterGain;
+    attribute double coneInnerAngle;
+    attribute double coneOuterAngle;
+    attribute double coneOuterGain;
 };