Make [TypeChecking=Interface] the default

third_party/WebKit/Source/core/events/CompositionEvent.idl

Index: third_party/WebKit/Source/core/events/CompositionEvent.idl
diff --git a/third_party/WebKit/Source/core/events/CompositionEvent.idl b/third_party/WebKit/Source/core/events/CompositionEvent.idl
index 3d2a209761bc12c8afb15b80608a76ab52e1366a..5040562c6f3a7e36a6712d1cc29deb3c7cb6bf34 100644
--- a/third_party/WebKit/Source/core/events/CompositionEvent.idl
+++ b/third_party/WebKit/Source/core/events/CompositionEvent.idl
@@ -33,9 +33,9 @@
     // https://w3c.github.io/uievents/#idl-interface-CompositionEvent-initializers
     // TODO(philipj): None of the initCompositionEvent() arguments should be
     // optional, and the spec has a locale argument after data.
-    [Measure] void initCompositionEvent([Default=Undefined] optional DOMString type,
-                                        [Default=Undefined] optional boolean bubbles,
-                                        [Default=Undefined] optional boolean cancelable,
-                                        [Default=Undefined] optional Window? view,
-                                        [Default=Undefined] optional DOMString data);
+    [Measure, LegacyInterfaceTypeChecking] void initCompositionEvent([Default=Undefined] optional DOMString type,
+                                                                     [Default=Undefined] optional boolean bubbles,
+                                                                     [Default=Undefined] optional boolean cancelable,
+                                                                     [Default=Undefined] optional Window? view,
+                                                                     [Default=Undefined] optional DOMString data);
 };