Remove 2-arg createBuffer from WebAudio

LayoutTests/webaudio/resources/buffer-loader.js

Index: LayoutTests/webaudio/resources/buffer-loader.js
diff --git a/LayoutTests/webaudio/resources/buffer-loader.js b/LayoutTests/webaudio/resources/buffer-loader.js
index 57f20158064fd9908e14a13ab3e2c3845e34594a..a4e3220dffacab75ecd1bbaf6d68d384ec6db2a7 100644
--- a/LayoutTests/webaudio/resources/buffer-loader.js
+++ b/LayoutTests/webaudio/resources/buffer-loader.js
@@ -16,19 +16,20 @@ BufferLoader.prototype.loadBuffer = function(url, index) {
 
     request.onload = function() {
         var buffer;

[Ken Russell (switch to Gerrit), 2014/04/13 08:33:54]

This variable isn't needed anymore.

[Raymond Toy, 2014/04/14 16:47:51]

Done.

-        try {
-            buffer = loader.context.createBuffer(request.response, false);
-        } catch(e) {
-            alert('error decoding file data: ' + url);
-        }
-
-        try {
-            loader.bufferList[index] = buffer;
-            if (++loader.loadCount == loader.urlList.length)
-                loader.onload(loader.bufferList);
-        } catch(e) {
-            alert('BufferLoader: callback problem');
-        }
+        loader.context.decodeAudioData(
+            request.response,
+            function (decodedAudio) {
+                try {
+                    loader.bufferList[index] = decodedAudio;
+                    if (++loader.loadCount == loader.urlList.length)
+                        loader.onload(loader.bufferList);
+                } catch(e) {
+                    alert('BufferLoader: unable to load buffer' + index);
+                }
+            },
+            function () {
+                alert('error decoding file data: ' + url);
+            });
     }
 
     request.onerror = function() {