Revert "Don't try to resolve in the builder."

dart/lib/compiler/implementation/ssa/builder.dart

Index: dart/lib/compiler/implementation/ssa/builder.dart
diff --git a/dart/lib/compiler/implementation/ssa/builder.dart b/dart/lib/compiler/implementation/ssa/builder.dart
index 4abba9ad1f258c5ee19d06a2f8c227cc4a13124e..e600b99e0eb41258a52d40638a0e84df2d49758e 100644
--- a/dart/lib/compiler/implementation/ssa/builder.dart
+++ b/dart/lib/compiler/implementation/ssa/builder.dart
@@ -2355,9 +2355,7 @@ class SsaBuilder extends ResolvedVisitor implements Visitor {
 
     Selector selector = elements.getSelector(node);
     Element element = elements[node];
-    if (compiler.enqueuer.resolution.getCachedElements(element) === null) {
-      compiler.internalError("Unresolved element: $element", node: node);
-    }
+    compiler.resolver.resolveMethodElement(element);
     FunctionElement functionElement = element;
     element = functionElement.defaultImplementation;
     HInstruction target = new HStatic(element);