Add an optional argument to HTMLCanvasElement.toDataURL.

lib/dom/idl/dart/dart.idl

 
 // This file introduces / supplements and forces Dart declarations.
 
 module default {
   FileList implements sequence<File>;
   HTMLCollection implements sequence<Node>;
   MediaList implements sequence<DOMString>;
   NamedNodeMap implements sequence<Node>;
   NodeList implements sequence<Node>;
   StyleSheetList implements sequence<StyleSheet>;
@@ skipping 39 matching lines @@
   };
 };
 
 module html {
   [Supplemental]
   interface Console {
     [Suppressed] void assert(in boolean condition);
     [CallWith=ScriptArguments|CallStack] void assertCondition(boolean condition);
   };
 
+  interface HTMLCanvasElement {
+    [Suppressed] DOMString toDataURL([TreatNullAs=NullString, TreatUndefinedAs=NullString,Optional=DefaultIsUndefined] in DOMString type) raises(DOMException);
+    [Custom] DOMString toDataURL([TreatNullAs=NullString, TreatUndefinedAs=NullString,Optional=DefaultIsUndefined] in DOMString type, [Optional] in float quality) raises(DOMException);
+
+  };
+
   [Supplemental]
   interface HTMLOptionsCollection {
     [Suppressed] void add([Optional] in HTMLOptionElement element, [Optional] in long before);
   };
 
   [Supplemental]
   interface ImageData {
     readonly attribute Uint8ClampedArray data;
   };
 
@@ skipping 200 matching lines @@
    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);
   };
 }