Revert "dart2js cps: Compile some loops as 'for' loops."

pkg/compiler/lib/src/tree_ir/optimization/statement_rewriter.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library tree_ir.optimization.statement_rewriter;
 
 import 'optimization.dart' show Pass;
 import '../tree_ir_nodes.dart';
 import '../../io/source_information.dart';
 
@@ skipping 646 matching lines @@
 
   Statement visitWhileTrue(WhileTrue node) {
     // Do not propagate assignments into loops.  Doing so is not safe for
     // variables modified in the loop (the initial value will be propagated).
     inEmptyEnvironment(() {
       node.body = visitStatement(node.body);
     });
     return node;
   }
 
-  Statement visitFor(For node) {
+  Statement visitWhileCondition(WhileCondition node) {
     // Not introduced yet
-    throw "Unexpected For in StatementRewriter";
+    throw "Unexpected WhileCondition in StatementRewriter";
   }
 
   Statement visitTry(Try node) {
     inEmptyEnvironment(() {
       Set<Label> saved = safeForInlining;
       safeForInlining = new Set<Label>();
       node.tryBody = visitStatement(node.tryBody);
       safeForInlining = saved;
       node.catchParameters.forEach(pushDominatingAssignment);
       node.catchBody = visitStatement(node.catchBody);
@@ skipping 537 matching lines @@
   VariableUseVisitor(this.callback);
 
   visitVariableUse(VariableUse use) => callback(use);
 
   visitInnerFunction(FunctionDefinition node) {}
 
   static void visit(Expression node, VariableUseCallback callback) {
     new VariableUseVisitor(callback).visitExpression(node);
   }
 }