GN threading refactor

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;
 
+// This class fills in the config values from a given scope. It's shared
+// between the "config" function call and all the different binary target types
+// (shared library, static library, etc.) since all of these support the
+// various flags stored in the ConfigValues class.
 class ConfigValuesGenerator {
  public:
   ConfigValuesGenerator(ConfigValues* dest_values,
                         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:
   ConfigValues* config_values_;
   Scope* scope_;
-  const Token& function_token_;
   const SourceDir input_dir_;
   Err* err_;
 
   DISALLOW_COPY_AND_ASSIGN(ConfigValuesGenerator);
 };
 
 // For using in documentation for functions which use this.
 #define CONFIG_VALUES_VARS_HELP \
     "  Flags: cflags, cflags_c, cflags_cc, cflags_objc, cflags_objcc,\n" \
     "         defines, include_dirs, ldflags, lib_dirs, libs\n"
 
 #endif  // TOOLS_GN_CONFIG_VALUES_GENERATOR_H_