dart2js cps: Clean up and avoid processing unreachable code.

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

 // Copyright (c) 2015, 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.pull_into_initializers;
 
 import 'optimization.dart' show Pass;
 import '../tree_ir_nodes.dart';
 
 /// Where a variable has been assigned.
@@ skipping 320 matching lines @@
     ++impureCounter;
     return node;
   }
 
   Expression visitSetIndex(SetIndex node) {
     super.visitSetIndex(node);
     ++impureCounter;
     return node;
   }
 
-  void visitInnerFunction(FunctionDefinition node) {
-    new PullIntoInitializers().rewrite(node);
-  }
-
-  Expression visitFunctionExpression(FunctionExpression node) {
-    visitInnerFunction(node.definition);
-    return node;
-  }
-
   Expression visitApplyBuiltinOperator(ApplyBuiltinOperator node) {
     rewriteList(node.arguments);
     return node;
   }
 
   Expression visitApplyBuiltinMethod(ApplyBuiltinMethod node) {
     node.receiver = visitExpression(node.receiver);
     if (!node.receiverIsNotNull) {
       // If the receiver is null, the method lookup throws.
       ++impureCounter;
     }
     rewriteList(node.arguments);
     ++impureCounter;
     return node;
   }
 
   @override
   Expression visitForeignExpression(ForeignExpression node) {
     rewriteList(node.arguments);
     if (node.nativeBehavior.sideEffects.hasSideEffects()) {
       ++impureCounter;
     }
     return node;
   }
 }