Implement StereoPannerNode for robust stereo panning

Source/modules/webaudio/StereoPannerNode.idl

Index: Source/modules/webaudio/StereoPannerNode.idl
diff --git a/Source/modules/webaudio/AudioDestinationNode.idl b/Source/modules/webaudio/StereoPannerNode.idl
similarity index 88%
copy from Source/modules/webaudio/AudioDestinationNode.idl
copy to Source/modules/webaudio/StereoPannerNode.idl
index e85caef35e12ea11313611a76e83bc2d36b3d372..c23fc625f0279ca9889826032663b70336d8014d 100644
--- a/Source/modules/webaudio/AudioDestinationNode.idl
+++ b/Source/modules/webaudio/StereoPannerNode.idl
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2010, Google Inc. All rights reserved.
+ * Copyright (C) 2014, Google Inc. All rights reserved.

[Raymond Toy, 2014/11/11 19:41:47]

Use the copyright style as mentioned here:
http://www.chromium.org/developers/coding-style, section File Headers

Do this for all of the new files that you've created.

[hongchan, 2014/11/12 00:06:54]

Done for this file.

Should I do the same thing on the files that I didn't create? (i.e.
AudioContext)

[Raymond Toy, 2014/11/12 00:16:44]

No. Only use the new copyright template for new files. The old files should not
be changed.

  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ -23,7 +23,10 @@
  */
 
 [
+    NoInterfaceObject,
     Conditional=WEB_AUDIO
-] interface AudioDestinationNode : AudioNode {
-    readonly attribute unsigned long maxChannelCount;
-};
+] interface StereoPannerNode : AudioNode {
+
+    readonly attribute AudioParam pan;
+
+};