Fix also type inference for enum method invocation.

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

Index: pkg/analyzer/lib/src/summary/link.dart
diff --git a/pkg/analyzer/lib/src/summary/link.dart b/pkg/analyzer/lib/src/summary/link.dart
index a3cd302bf6f3e35b97ffc24eca371553138cab18..0945db285db9aa2665e25ad4a065d2e5870baef5 100644
--- a/pkg/analyzer/lib/src/summary/link.dart
+++ b/pkg/analyzer/lib/src/summary/link.dart
@@ -436,6 +436,16 @@ abstract class ClassElementForLink extends Object
     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].
@@ -644,16 +654,6 @@ class ClassElementForLink_Class extends ClassElementForLink
   }
 
   @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);