Fix also type inference for enum method invocation.

pkg/analyzer/lib/src/summary/link.dart

 // Copyright (c) 2016, 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.
 
 /**
  * This library is capable of producing linked summaries from unlinked
  * ones (or prelinked ones).  It functions by building a miniature
  * element model to represent the contents of the summaries, and then
  * scanning the element model to gather linked information and adding
  * it to the summary data structures.
@@ skipping 418 matching lines @@
   @override
   PropertyAccessorElement getGetter(String getterName) {
     for (PropertyAccessorElement accessor in accessors) {
       if (accessor.isGetter && accessor.name == getterName) {
         return accessor;
       }
     }
     return null;
   }
 
+  @override
+  MethodElement getMethod(String methodName) {
+    for (MethodElement method in methods) {
+      if (method.name == methodName) {
+        return method;
+      }
+    }
+    return null;
+  }
+
   /**
    * Perform type inference and cycle detection on this class and
    * store the resulting information in [compilationUnit].
    */
   void link(CompilationUnitElementInBuildUnit compilationUnit);
 
   @override
   noSuchMethod(Invocation invocation) => super.noSuchMethod(invocation);
 }
 
@@ skipping 188 matching lines @@
       } else {
         return new InterfaceTypeImpl.elementWithNameAndArgs(
             this, name, () => typeArguments);
       }
     } else {
       return _type ??= new InterfaceTypeImpl(this);
     }
   }
 
   @override
-  MethodElement getMethod(String methodName) {
-    for (MethodElement method in methods) {
-      if (method.name == methodName) {
-        return method;
-      }
-    }
-    return null;
-  }
-
-  @override
   void link(CompilationUnitElementInBuildUnit compilationUnit) {
     for (ConstructorElementForLink constructorElement in constructors) {
       constructorElement.link(compilationUnit);
     }
     if (library._linker.strongMode) {
       for (MethodElementForLink methodElement in methods) {
         methodElement.link(compilationUnit);
       }
       for (PropertyAccessorElementForLink propertyAccessorElement
           in accessors) {
@@ skipping 4516 matching lines @@
    * there are no type parameters in scope.
    */
   TypeParameterizedElementMixin get _typeParameterContext;
 
   @override
   noSuchMethod(Invocation invocation) => super.noSuchMethod(invocation);
 
   @override
   String toString() => '$enclosingElement.$name';
 }