Don't infer non-final field types

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

Index: compiler/java/com/google/dart/compiler/resolver/Resolver.java
diff --git a/compiler/java/com/google/dart/compiler/resolver/Resolver.java b/compiler/java/com/google/dart/compiler/resolver/Resolver.java
index b4032c80774563a965aebc55083be4f582307409..47e668d8d47e0901a2bae46cae5f1b74e9e539b9 100644
--- a/compiler/java/com/google/dart/compiler/resolver/Resolver.java
+++ b/compiler/java/com/google/dart/compiler/resolver/Resolver.java
@@ -679,7 +679,7 @@ public class Resolver {
         // Now, this constant has a type. Save it for future reference.
         Element element = node.getElement();
         Type expressionType = expression.getType();
-        if (expressionType != null && TypeKind.of(element.getType()) == TypeKind.DYNAMIC) {
+        if (isFinal && expressionType != null && TypeKind.of(element.getType()) == TypeKind.DYNAMIC) {
           Type fieldType = Types.makeInferred(expressionType);
           Elements.setType(element, fieldType);
         }