Attempting to remove ArrayBufferView.buffer penalty.

tools/dom/scripts/generator.py

Index: tools/dom/scripts/generator.py
diff --git a/tools/dom/scripts/generator.py b/tools/dom/scripts/generator.py
index 1eec9f02f1017d8be1cb72a565cfd78d6c0c1fdc..c84c6e697dbf01624f8b0b550b3a5ef53002bdd1 100644
--- a/tools/dom/scripts/generator.py
+++ b/tools/dom/scripts/generator.py
@@ -553,6 +553,16 @@ def FindConversion(idl_type, direction, interface, member):
 
 dart2js_annotations = monitored.Dict('generator.dart2js_annotations', {
 
+    'ArrayBuffer': [
+      "@Creates('ArrayBuffer')",
+      "@Returns('ArrayBuffer|Null')",
+    ],
+
+    'ArrayBufferView': [
+      "@Creates('ArrayBufferView')",
+      "@Returns('ArrayBufferView|Null')",
+    ],
+
     'CanvasRenderingContext2D.createImageData': [
       "@Creates('ImageData|=Object')",
     ],
@@ -611,7 +621,6 @@ dart2js_annotations = monitored.Dict('generator.dart2js_annotations', {
       "@Returns('Element|Document')",
     ],
 
-
     'FileReader.result': ["@Creates('String|ArrayBuffer|Null')"],
 
     # Rather than have the result of an IDBRequest as a union over all possible