Share the first error messages.

pkg/compiler/lib/src/diagnostics/messages.dart

Index: pkg/compiler/lib/src/diagnostics/messages.dart
diff --git a/pkg/compiler/lib/src/diagnostics/messages.dart b/pkg/compiler/lib/src/diagnostics/messages.dart
index f394bdf5cc93bfbfefbfb08d01ee470b8e7c023a..e2f9f8b01eb11d3dcb346a2c20cd9f67c255ddc1 100644
--- a/pkg/compiler/lib/src/diagnostics/messages.dart
+++ b/pkg/compiler/lib/src/diagnostics/messages.dart
@@ -146,7 +146,7 @@ enum MessageKind {
   CONSIDER_ANALYZE_ALL,
   CONST_CALLS_NON_CONST,
   CONST_CALLS_NON_CONST_FOR_IMPLICIT,
-  CONST_CONSTRUCTOR_HAS_BODY,
+  CONST_CONSTRUCTOR_OR_FACTORY_WITH_BODY,
   CONST_CONSTRUCTOR_WITH_NONFINAL_FIELDS,
   CONST_CONSTRUCTOR_WITH_NONFINAL_FIELDS_CONSTRUCTOR,
   CONST_CONSTRUCTOR_WITH_NONFINAL_FIELDS_FIELD,
@@ -979,17 +979,6 @@ main() {}"""},
         const MessageTemplate(MessageKind.REDIRECTING_CONSTRUCTOR_HAS_BODY,
           "Redirecting constructor can't have a body."),
 
-      MessageKind.CONST_CONSTRUCTOR_HAS_BODY:
-        const MessageTemplate(MessageKind.CONST_CONSTRUCTOR_HAS_BODY,
-          "Const constructor or factory can't have a body.",
-          howToFix: "Remove the 'const' keyword or the body",
-          examples: const ["""
-class C {
-  const C() {}
-}
-
-main() => new C();"""]),
-
       MessageKind.REDIRECTING_CONSTRUCTOR_HAS_INITIALIZER:
         const MessageTemplate(
           MessageKind.REDIRECTING_CONSTRUCTOR_HAS_INITIALIZER,