Make the Mac build work.

tools/gn/config_values_generator.h

 // Copyright (c) 2013 The Chromium 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 TOOLS_GN_CONFIG_VALUES_GENERATOR_H_
 #define TOOLS_GN_CONFIG_VALUES_GENERATOR_H_
 
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "tools/gn/source_dir.h"
 
 class ConfigValues;
 class Err;
 class Scope;
 class Token;
 
 class ConfigValuesGenerator {
  public:
   ConfigValuesGenerator(ConfigValues* dest_values,
-                        const Scope* scope,
+                        Scope* scope,
                         const Token& function_token,
                         const SourceDir& input_dir,
                         Err* err);
   ~ConfigValuesGenerator();
 
   // Sets the error passed to the constructor on failure.
   void Run();
 
  private:
-  void FillDefines();
   void FillIncludes();
-  void FillCflags();
-  void FillCflags_C();
-  void FillCflags_CC();
-  void FillLdflags();
 
   ConfigValues* config_values_;
-  const Scope* scope_;
+  Scope* scope_;
   const Token& function_token_;
   const SourceDir input_dir_;
   Err* err_;
 
   DISALLOW_COPY_AND_ASSIGN(ConfigValuesGenerator);
 };
 
 #endif  // TOOLS_GN_CONFIG_VALUES_GENERATOR_H_