Throw NoSuchMethod or ArgumentError instead of generating a bailout, when we know the next instruct…

sdk/lib/_internal/compiler/implementation/world.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 part of dart2js;
 
 class World {
   final Compiler compiler;
   final Map<ClassElement, Set<MixinApplicationElement>> mixinUses;
   final Map<ClassElement, Set<ClassElement>> typesImplementedBySubclasses;
@@ skipping 146 matching lines @@
     ClassElement receiverTypeElement = (mask == null || mask.base == null)
         ? compiler.objectClass
         : mask.base.element;
     // We only return the found element if it is guaranteed to be
     // implemented on the exact receiver type. It could be found in a
     // subclass or in an inheritance-wise unrelated class in case of
     // subtype selectors.
     return (receiverTypeElement.isSubclassOf(enclosing)) ? result : null;
   }
 
+  bool hasSingleMatch(Selector selector) {
+    Iterable<Element> targets = allFunctions.filter(selector);
+    return targets.length == 1;
+  }
+
   Iterable<ClassElement> locateNoSuchMethodHolders(Selector selector) {
     Selector noSuchMethodSelector = compiler.noSuchMethodSelector;
     ti.TypeMask mask = selector.mask;
     if (mask != null) {
       noSuchMethodSelector = new TypedSelector(mask, noSuchMethodSelector);
     }
     ClassElement objectClass = compiler.objectClass;
     return allFunctions
         .filter(noSuchMethodSelector)
         .map((Element member) => member.getEnclosingClass())
         .where((ClassElement holder) => !identical(holder, objectClass));
   }
 
   void addFunctionCalledInLoop(Element element) {
     functionsCalledInLoop.add(element);
   }
 
   bool isCalledInLoop(Element element) {
     return functionsCalledInLoop.contains(element);
   }
 }