Stop using with explicitly to implement try/catch.

src/rewriter.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 234 matching lines @@
   UNREACHABLE();
 }
 
 
 void Processor::VisitObjectLiteral(ObjectLiteral* node) {
   USE(node);
   UNREACHABLE();
 }
 
 
-void Processor::VisitCatchExtensionObject(CatchExtensionObject* node) {
-  USE(node);
-  UNREACHABLE();
-}
-
-
 void Processor::VisitAssignment(Assignment* node) {
   USE(node);
   UNREACHABLE();
 }
 
 
 void Processor::VisitThrow(Throw* node) {
   USE(node);
   UNREACHABLE();
 }
@@ skipping 80 matching lines @@
       VariableProxy* result_proxy = new VariableProxy(result);
       body->Add(new ReturnStatement(result_proxy));
     }
   }
 
   return true;
 }
 
 
 } }  // namespace v8::internal