Turn error into warning for non-static member access through the class.

sdk/lib/_internal/compiler/implementation/resolution/members.dart

Index: sdk/lib/_internal/compiler/implementation/resolution/members.dart
diff --git a/sdk/lib/_internal/compiler/implementation/resolution/members.dart b/sdk/lib/_internal/compiler/implementation/resolution/members.dart
index c72715dc5c64c77fe6da1b7da43385c96e820679..212a5b2f7753e6af492901a7397f79749fe40f0b 100644
--- a/sdk/lib/_internal/compiler/implementation/resolution/members.dart
+++ b/sdk/lib/_internal/compiler/implementation/resolution/members.dart
@@ -1953,7 +1953,7 @@ class ResolverVisitor extends CommonResolverVisitor<Element> {
         return null;
       }
       target = receiverClass.lookupLocalMember(name);
-      if (target == null) {
+      if (target == null || target.isInstanceMember()) {
         compiler.backend.registerThrowNoSuchMethod();
         // TODO(johnniwinther): With the simplified [TreeElements] invariant,
         // try to resolve injected elements if [currentClass] is in the patch
@@ -1962,14 +1962,12 @@ class ResolverVisitor extends CommonResolverVisitor<Element> {
         // TODO(karlklose): this should be reported by the caller of
         // [resolveSend] to select better warning messages for getters and
         // setters.
-        return warnAndCreateErroneousElement(node, name,
-                                             MessageKind.METHOD_NOT_FOUND,
+        MessageKind kind = (target == null)
+            ? MessageKind.METHOD_NOT_FOUND
+            : MessageKind.MEMBER_NOT_STATIC;
+        return warnAndCreateErroneousElement(node, name, kind,
                                              {'className': receiverClass.name,
                                               'methodName': name});
-      } else if (target.isInstanceMember()) {
-        error(node, MessageKind.MEMBER_NOT_STATIC,
-              {'className': receiverClass.name,
-               'memberName': name});
       }
     } else if (identical(resolvedReceiver.kind, ElementKind.PREFIX)) {
       PrefixElement prefix = resolvedReceiver;