Add toStructuredText to ConstantExpression and align method names with ConstantValue

pkg/compiler/lib/src/resolution/class_hierarchy.dart

Index: pkg/compiler/lib/src/resolution/class_hierarchy.dart
diff --git a/pkg/compiler/lib/src/resolution/class_hierarchy.dart b/pkg/compiler/lib/src/resolution/class_hierarchy.dart
index adaa1778c31fef0667bf940710dfa57a1380d3e8..4079c7843642ea7e4fca90e9b5777d03fa57bf4d 100644
--- a/pkg/compiler/lib/src/resolution/class_hierarchy.dart
+++ b/pkg/compiler/lib/src/resolution/class_hierarchy.dart
@@ -212,9 +212,9 @@ class ClassResolverVisitor extends TypeDefinitionVisitor {
           new SynthesizedConstructorElementX.forDefault(superMember, element);
       if (superMember.isMalformed) {
         ErroneousElement erroneousElement = superMember;
-        compiler.registerCompiletimeError(constructor,
-            reporter.createMessage(node,
-                erroneousElement.messageKind,
+        compiler.registerCompiletimeError(
+            constructor,
+            reporter.createMessage(node, erroneousElement.messageKind,
                 erroneousElement.messageArguments));
       }
       element.setDefaultConstructor(constructor, reporter);