Changes to support Chrome roll.

tools/dom/idl/dart/dart.idl

 // This file introduces / supplements and forces Dart declarations.
 
 [Supplemental,
  Constructor]
 interface AudioContext {};
 
 [Supplemental]
 interface Document {
   [Suppressed] DOMObject getCSSCanvasContext(in DOMString contextId, in DOMString name, in long width, in long height);
   CanvasRenderingContext getCSSCanvasContext(in DOMString contextId, in DOMString name, in long width, in long height);
 };
 
 [Supplemental]
 interface ScriptProcessorNode {
   // FIXME(antonm): provide proper support.
   [Suppressed] attribute EventListener onaudioprocess;
 };
 
 // Force ElementTraversal. WebKit defines these directly.
 interface ElementTraversal {
   readonly attribute unsigned long childElementCount;
   readonly attribute Element firstElementChild;
   readonly attribute Element lastElementChild;
   readonly attribute Element nextElementSibling;
   readonly attribute Element previousElementSibling;
 };
 Element implements ElementTraversal;
 
+// TODO(antonm): fix it
+[Supplemental, Constructor]
+interface MediaStream {};
+
 [Callback]
 interface TimeoutHandler {
   void handleEvent();
 };
 
 [Supplemental]
 interface Console {
   [Suppressed] void assert(in boolean condition);
   [CallWith=ScriptArguments|ScriptState] void assertCondition(boolean condition);
 };
@@ skipping 241 matching lines @@
 };
 
 [Supplemental, Callback] // Add missing Callback attribute.
 interface VoidCallback {
 };
 
 interface SVGNumber {
   [StrictTypeChecking, Custom] attribute float value;
 };
 
+// TODO(antonm): get rid of it to follow V8 bindings.
+[
+  Callback
+] interface MutationCallback {
+  [Custom] boolean handleEvent(in MutationRecordArray mutations, in MutationObserver observer);
+};
+
 [Supplemental,
   CustomConstructor,
   // Provide missing constructor signature.
   Constructor(MutationCallback callback)]
 interface MutationObserver {
   // Rename 'observe' so we can define a new 'observe' API that calls the
   // original.
   [DartName=_observe] void observe(in Node target, in Dictionary options)
       raises(DOMException);
 };
@@ skipping 26 matching lines @@
   [Suppressed] boolean send(in DOMString data) raises(DOMException);
 
   [Custom] void send(DOMString data) raises(DOMException);
   [Custom] void send(Blob data) raises(DOMException);
   [Custom] void send(ArrayBuffer data) raises(DOMException);
   [Custom] void send(ArrayBufferView data) raises(DOMException);
 };
 
 [Suppressed]
 interface Entity {};