Make some ErrorCode-s compile-time errors and some just type warnings

compiler/java/com/google/dart/compiler/resolver/SupertypeResolver.java

Index: compiler/java/com/google/dart/compiler/resolver/SupertypeResolver.java
diff --git a/compiler/java/com/google/dart/compiler/resolver/SupertypeResolver.java b/compiler/java/com/google/dart/compiler/resolver/SupertypeResolver.java
index 1fdb007f3613538199a0a6a263ffeace1b769b9b..6af78affb2dada74c87410f12940b6059595aefa 100644
--- a/compiler/java/com/google/dart/compiler/resolver/SupertypeResolver.java
+++ b/compiler/java/com/google/dart/compiler/resolver/SupertypeResolver.java
@@ -57,6 +57,10 @@ public class SupertypeResolver {
         supertype.getClass(); // Quick null check.
       }
       if (supertype != null) {
+        // TODO(scheglov) check for "extends/implements Dynamic"
+        /*if (supertype == typeProvider.getDynamicType()) {
+          topLevelContext.onError(superclassNode, ResolverErrorCode.EXTENDS_DYNAMIC, node.getName());
+        }*/
         classElement.setSupertype(supertype);
       } else {
         assert classElement.getName().equals("Object") : classElement;
@@ -80,7 +84,11 @@ public class SupertypeResolver {
         DartTypeNode boundNode = typeParameterNode.getBound();
         Type bound;
         if (boundNode != null) {
-          bound = classContext.resolveType(boundNode, false);
+          bound =
+              classContext.resolveType(
+                  boundNode,
+                  false,
+                  ResolverErrorCode.NO_SUCH_TYPE);
           boundNode.setType(bound);
         } else {
           bound = typeProvider.getObjectType();