Roll 50: Copied IDLs, PYTHON scripts from WebKit removed deleted files in WebCore

core/html/HTMLCanvasElement.idl

Index: core/html/HTMLCanvasElement.idl
diff --git a/core/html/HTMLCanvasElement.idl b/core/html/HTMLCanvasElement.idl
index 458e8ab62eefa8290ff77ce7d0925f43ac07393e..15e7e501013358ba0c18fdce61628b3026ea8c88 100644
--- a/core/html/HTMLCanvasElement.idl
+++ b/core/html/HTMLCanvasElement.idl
@@ -26,7 +26,8 @@
 
 // https://html.spec.whatwg.org/#the-canvas-element
 
-interface HTMLCanvasElement : HTMLElement {
+interface HTMLCanvasElement : HTMLElement
+{
     // FIXME: width and height should be unsigned long.
     attribute long width;
     attribute long height;
@@ -45,11 +46,12 @@ interface HTMLCanvasElement : HTMLElement {
     // handled differently the return type could be changed to "RenderingContext?"
     // and the [CallWith=ScriptState] extended attribute removed.
     //
-    // FIXME: The contextId argument should not be optional.
-    [CallWith=ScriptState] any getContext([Default=Undefined] optional DOMString contextId, [PermissiveDictionaryConversion] optional CanvasContextCreationAttributes attributes);
+    [CallWith=ScriptState] any getContext(DOMString contextId, [PermissiveDictionaryConversion] optional CanvasContextCreationAttributes attributes);
 
     // Note: The arguments argument is variadic in the spec, but not here as
     // only one extra argument is actually used.
-    // FIXME: type should not be nullable or have a default value.
-    [RaisesException] DOMString toDataURL(optional DOMString? type = null, optional any arguments);
+    // FIXME: type should not have a default value.
+    [RaisesException] DOMString toDataURL(optional DOMString type = null, optional any arguments);
+
+    [RaisesException] void toBlob(BlobCallback _callback, optional DOMString type = null, optional any arguments);
 };