Drop [LegacyInterfaceTypeChecking] where trivial in core/

third_party/WebKit/Source/core/fileapi/FileReaderSync.idl

Index: third_party/WebKit/Source/core/fileapi/FileReaderSync.idl
diff --git a/third_party/WebKit/Source/core/fileapi/FileReaderSync.idl b/third_party/WebKit/Source/core/fileapi/FileReaderSync.idl
index 63d8a2e849f0ab8c05d84e40b645409a7bf49840..d587242304872774163b3d7f8f6f5236b64dfdb1 100644
--- a/third_party/WebKit/Source/core/fileapi/FileReaderSync.idl
+++ b/third_party/WebKit/Source/core/fileapi/FileReaderSync.idl
@@ -35,10 +35,10 @@
     Exposed=Worker,
     Constructor,
 ] interface FileReaderSync {
-    [CallWith=ExecutionContext, RaisesException, LegacyInterfaceTypeChecking] ArrayBuffer readAsArrayBuffer(Blob blob);
+    [CallWith=ExecutionContext, RaisesException] ArrayBuffer readAsArrayBuffer(Blob blob);
     // TODO(philipj): readAsBinaryString() was removed from the spec in 2012:
     // https://github.com/w3c/FileAPI/commit/8cce54559dc27bf8b8244f3f0ca9fb3e4d96efdb
-    [CallWith=ExecutionContext, RaisesException, LegacyInterfaceTypeChecking, Measure] DOMString readAsBinaryString(Blob blob);
-    [CallWith=ExecutionContext, RaisesException, LegacyInterfaceTypeChecking] DOMString readAsText(Blob blob, optional DOMString label);
-    [CallWith=ExecutionContext, RaisesException, LegacyInterfaceTypeChecking] DOMString readAsDataURL(Blob blob);
+    [CallWith=ExecutionContext, RaisesException, Measure] DOMString readAsBinaryString(Blob blob);
+    [CallWith=ExecutionContext, RaisesException] DOMString readAsText(Blob blob, optional DOMString label);
+    [CallWith=ExecutionContext, RaisesException] DOMString readAsDataURL(Blob blob);
 };