Stop using with explicitly to implement try/catch.

src/parser.h

 // 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 480 matching lines @@
   Statement* ParseNativeDeclaration(bool* ok);
   Block* ParseBlock(ZoneStringList* labels, bool* ok);
   Block* ParseVariableStatement(bool* ok);
   Block* ParseVariableDeclarations(bool accept_IN, Expression** var, bool* ok);
   Statement* ParseExpressionOrLabelledStatement(ZoneStringList* labels,
                                                 bool* ok);
   IfStatement* ParseIfStatement(ZoneStringList* labels, bool* ok);
   Statement* ParseContinueStatement(bool* ok);
   Statement* ParseBreakStatement(ZoneStringList* labels, bool* ok);
   Statement* ParseReturnStatement(bool* ok);
-  Block* WithHelper(Expression* obj,
-                    ZoneStringList* labels,
-                    bool is_catch_block,
-                    bool* ok);
+  Block* WithHelper(Expression* obj, ZoneStringList* labels, bool* ok);
   Statement* ParseWithStatement(ZoneStringList* labels, bool* ok);
   CaseClause* ParseCaseClause(bool* default_seen_ptr, bool* ok);
   SwitchStatement* ParseSwitchStatement(ZoneStringList* labels, bool* ok);
   DoWhileStatement* ParseDoWhileStatement(ZoneStringList* labels, bool* ok);
   WhileStatement* ParseWhileStatement(ZoneStringList* labels, bool* ok);
   Statement* ParseForStatement(ZoneStringList* labels, bool* ok);
   Statement* ParseThrowStatement(bool* ok);
   Expression* MakeCatchContext(Handle<String> id, VariableProxy* value);
   TryStatement* ParseTryStatement(bool* ok);
   DebuggerStatement* ParseDebuggerStatement(bool* ok);
@@ skipping 241 matching lines @@
  private:
   static const int kTypeSlot = 0;
   static const int kElementsSlot = 1;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(CompileTimeValue);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_PARSER_H_