Fix a wrong type annotation.

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

 // Copyright (c) 2012, 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.
 
 part of ssa;
 
 class Interceptors {
   Compiler compiler;
   Interceptors(Compiler this.compiler);
 
@@ skipping 3100 matching lines @@
       if (returnType != null) instruction.guaranteedType = returnType;
       pushWithPosition(instruction, node);
     } else {
       generateGetter(node, element);
       List<HInstruction> inputs = <HInstruction>[pop()];
       addDynamicSendArgumentsToList(node, inputs);
       pushWithPosition(new HInvokeClosure(selector, inputs), node);
     }
   }
 
-  HConstant addConstantString(Identifier node, String string) {
+  HConstant addConstantString(Node node, String string) {
     DartString dartString = new DartString.literal(string);
     Constant constant = constantSystem.createString(dartString, node);
     return graph.addConstant(constant);
   }
 
   visitTypeReferenceSend(Send node) {
     Element element = elements[node];
     HInstruction name;
     Element helper =
         compiler.findHelper(RuntimeTypeInformation.CACHE_HELPER_NAME);
@@ skipping 1543 matching lines @@
           new HSubGraphBlockInformation(elseBranch.graph));
 
     HBasicBlock conditionStartBlock = conditionBranch.block;
     conditionStartBlock.setBlockFlow(info, joinBlock);
     SubGraph conditionGraph = conditionBranch.graph;
     HIf branch = conditionGraph.end.last;
     assert(branch is HIf);
     branch.blockInformation = conditionStartBlock.blockFlow;
   }
 }