gn: start of format command

tools/gn/commands.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_COMMANDS_H_
 #define TOOLS_GN_COMMANDS_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 23 matching lines @@
 extern const char kDesc[];
 extern const char kDesc_HelpShort[];
 extern const char kDesc_Help[];
 int RunDesc(const std::vector<std::string>& args);
 
 extern const char kGen[];
 extern const char kGen_HelpShort[];
 extern const char kGen_Help[];
 int RunGen(const std::vector<std::string>& args);
 
+extern const char kFormat[];
+extern const char kFormat_HelpShort[];
+extern const char kFormat_Help[];
+int RunFormat(const std::vector<std::string>& args);
+
 extern const char kHelp[];
 extern const char kHelp_HelpShort[];
 extern const char kHelp_Help[];
 int RunHelp(const std::vector<std::string>& args);
 
 extern const char kLs[];
 extern const char kLs_HelpShort[];
 extern const char kLs_Help[];
 int RunLs(const std::vector<std::string>& args);
 
@@ skipping 51 matching lines @@
 // On success, returns true. If the check fails, the error(s) will be printed
 // to stdout and false will be returned.
 bool CheckPublicHeaders(const BuildSettings* build_settings,
                         const std::vector<const Target*>& all_targets,
                         const std::vector<const Target*>& to_check,
                         bool force_check);
 
 }  // namespace commands
 
 #endif  // TOOLS_GN_COMMANDS_H_