Parser / PreParser: Simplify error message arguments.

src/parser.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_PARSER_H_
 #define V8_PARSER_H_
 
 #include "allocation.h"
 #include "ast.h"
 #include "compiler.h"  // For CachedDataMode
@@ skipping 71 matching lines @@
   void Initialize();
   void ReadNextSymbolPosition();
 
   FunctionEntry GetFunctionEntry(int start);
   int GetSymbolIdentifier();
   bool SanityCheck();
 
   Scanner::Location MessageLocation() const;
   bool IsReferenceError() const;
   const char* BuildMessage() const;
-  Vector<const char*> BuildArgs() const;
+  const char* BuildArg() const;
 
   int function_count() {
     int functions_size =
         static_cast<int>(store_[PreparseDataConstants::kFunctionsSizeOffset]);
     if (functions_size < 0) return 0;
     if (functions_size % FunctionEntry::kSize != 0) return 0;
     return functions_size / FunctionEntry::kSize;
   }
   // The following functions should only be called if SanityCheck has
   // returned true.
@@ skipping 405 matching lines @@
   Expression* NewThrowTypeError(const char* type, Handle<Object> arg, int pos);
 
   // Generic AST generator for throwing errors from compiled code.
   Expression* NewThrowError(
       Handle<String> constructor, const char* type,
       Vector<Handle<Object> > arguments, int pos);
 
   // Reporting errors.
   void ReportMessageAt(Scanner::Location source_location,
                        const char* message,
-                       Vector<const char*> args,
+                       const char* arg,
                        bool is_reference_error = false);
   void ReportMessage(const char* message,
-                     Vector<Handle<String> > args,
+                     MaybeHandle<String> arg,
                      bool is_reference_error = false);
   void ReportMessageAt(Scanner::Location source_location,
                        const char* message,
-                       Vector<Handle<String> > args,
+                       MaybeHandle<String> arg,
                        bool is_reference_error = false);
 
   // "null" return type creators.
   static Handle<String> EmptyIdentifier() {
     return Handle<String>();
   }
   static Expression* EmptyExpression() {
     return NULL;
   }
   static Literal* EmptyLiteral() {
@@ skipping 283 matching lines @@
  private:
   static const int kLiteralTypeSlot = 0;
   static const int kElementsSlot = 1;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(CompileTimeValue);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_PARSER_H_