Update legacycaller FIXMEs to reflect spec changes

third_party/WebKit/Source/core/html/HTMLEmbedElement.idl

Index: third_party/WebKit/Source/core/html/HTMLEmbedElement.idl
diff --git a/third_party/WebKit/Source/core/html/HTMLEmbedElement.idl b/third_party/WebKit/Source/core/html/HTMLEmbedElement.idl
index e90da6471733a7e57e5b5d4d03ef8225c123c4ee..ee74abae48a4b584056285a3f60954b50c541ae7 100644
--- a/third_party/WebKit/Source/core/html/HTMLEmbedElement.idl
+++ b/third_party/WebKit/Source/core/html/HTMLEmbedElement.idl
@@ -20,6 +20,8 @@
 
 // https://html.spec.whatwg.org/#the-embed-element
 
+// TODO(foolip): HTMLEmbedElement should not have [Custom=LegacyCallAsFunction].
+// https://crbug.com/663662
 // TODO(yukishiino): HTMLEmbedElement should not have [OverrideBuiltins].
 [
     Custom=LegacyCallAsFunction,
@@ -30,7 +32,6 @@
     [CEReactions, Reflect] attribute DOMString width;
     [CEReactions, Reflect] attribute DOMString height;
     [CheckSecurity=ReturnValue, RaisesException] Document? getSVGDocument();
-    // FIXME: The spec has a legacycaller any (any... arguments); crbug.com/465009
 
     // obsolete members
     // https://html.spec.whatwg.org/#HTMLEmbedElement-partial