Dispatch change event for input type=color when colorpicker is closed

Source/core/testing/Internals.idl

Index: Source/core/testing/Internals.idl
diff --git a/Source/core/testing/Internals.idl b/Source/core/testing/Internals.idl
index c6704f03866dc0e7c23205cdad4627b3595a7794..fc8051f3e3ab0909bdc2cfdc3442fcdb080652e7 100644
--- a/Source/core/testing/Internals.idl
+++ b/Source/core/testing/Internals.idl
@@ -76,6 +76,7 @@
     DOMString visiblePlaceholder(Element element);
 
     [TypeChecking=Interface] void selectColorInColorChooser(Element element, DOMString colorValue);
+    [TypeChecking=Interface] void endColorChooser(Element element);
 
     // If the argument is omitted, the top-level document is used.
     boolean hasAutofocusRequest(optional Document document);