Revert "Support unary - operator."

dart/lib/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.
 
 class Interceptors {
   Compiler compiler;
   Interceptors(Compiler this.compiler);
 
   SourceString mapOperatorToMethodName(Operator op) {
     String name = op.source.stringValue;
@@ skipping 2174 matching lines @@
   }
 
   visitDynamicSend(Send node) {
     Selector selector = elements.getSelector(node);
     var inputs = <HInstruction>[];
 
     SourceString dartMethodName;
     bool isNotEquals = false;
     if (node.isIndex && !node.arguments.tail.isEmpty()) {
       dartMethodName = Elements.constructOperatorName(
-          const SourceString('[]='), false);
+          const SourceString('operator'),
+          const SourceString('[]='));
     } else if (node.selector.asOperator() != null) {
       SourceString name = node.selector.asIdentifier().source;
       isNotEquals = name.stringValue === '!=';
       dartMethodName = Elements.constructOperatorName(
-          name, node.argumentsNode is Prefix);
+          const SourceString('operator'),
+          name,
+          node.argumentsNode is Prefix);
     } else {
       dartMethodName = node.selector.asIdentifier().source;
     }
 
     Element interceptor = null;
     if (methodInterceptionEnabled && node.receiver !== null) {
       interceptor = interceptors.getStaticInterceptor(dartMethodName,
                                                       node.argumentCount());
     }
     if (interceptor != null) {
@@ skipping 1722 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;
   }
 }