Optimize needNoSuchMethodHandling computation

pkg/compiler/lib/src/elements/elements.dart

Index: pkg/compiler/lib/src/elements/elements.dart
diff --git a/pkg/compiler/lib/src/elements/elements.dart b/pkg/compiler/lib/src/elements/elements.dart
index 29e2396e84a6db5c33f0d4844f0e78e8423622e4..58596d9a509f8ea7732422e3a2df3caabeefaa93 100644
--- a/pkg/compiler/lib/src/elements/elements.dart
+++ b/pkg/compiler/lib/src/elements/elements.dart
@@ -1555,7 +1555,13 @@ abstract class ClassElement extends TypeDeclarationElement
   void reverseBackendMembers();
 
   Element lookupMember(String memberName);
-  Element lookupByName(Name memberName);
+
+  /// Looks up a class instance member declared or inherited in this class
+  /// using [memberName] to match the (private) name and getter/setter property.
+  ///
+  /// If [stopAtSuperclass], no member from [stopAtSuperclass] or its

[Siggi Cherem (dart-lang), 2016/10/17 19:30:33]

If [stopAtSuperclass]... is specified?

ALternatively, "this recursively visits superclasses until the member is found
or [stopAt] is reached"?

[Johnni Winther, 2016/10/18 08:13:51]

Done.

+  /// superclasses will be returned.
+  Element lookupByName(Name memberName, {ClassElement stopAtSuperclass});

[Siggi Cherem (dart-lang), 2016/10/17 19:30:33]

nit: rename to just stopAt?

[Johnni Winther, 2016/10/18 08:13:51]

Done.

   Element lookupSuperByName(Name memberName);
 
   Element lookupLocalMember(String memberName);