Fixed tests for DOMPoint support for dart2js.

tools/dom/idl/dart/dart.idl

 // This file introduces / supplements and forces Dart declarations.
 
 [DartSupplemental,
  Constructor]
 interface AudioContext {
   // TODO(ager): Auto-generate this custom method when the info about retaining
   // typed arrays is in the IDL.
   [Custom] void decodeAudioData(ArrayBuffer audioData, AudioBufferCallback successCallback, AudioBufferCallback errorCallback);
 };
 
@@ skipping 210 matching lines @@
   EntrySync getParent();
 };
 
 [DartSupplemental,
   CustomConstructor,
   Constructor(Array blobParts, optional DOMString type, optional DOMString endings)
   ]
 interface Blob {
 };
 
-[DartSupplemental,
-  Constructor(float x, float y)
-]
-interface WebKitPoint {
-};
-
 [DartSupplemental, Callback] // Add missing Callback attribute.
 interface VoidCallback {
 };
 
 interface SVGNumber {
   [DartStrictTypeChecking, Custom] attribute float value;
 };
 
 // Keep it in to generate Dart code, C++ implementation is filterd out in generator.
 [Callback]
@@ skipping 219 matching lines @@
     //              is Uint8Array or sequence<unsigned long>.  For now suppress
     //              the new operation. Vijay suggestion, and I think this makes
     //              sense, change dart:html to have a send operation that takes
     //              a List<int> and have custom handler to call the correct
     //              method.  The dart:blink library needs to do something else
     //              postfix the name with send_sequence (?).
     [DartSuppress] void send(sequence<unsigned long> data, optional double timestamp);
 };
 
 Element implements GlobalEventHandlers;