GN: Makes GN output deterministic

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 <set>
 #include <string>
 #include <vector>
 
 #include "base/strings/string_piece.h"
+#include "tools/gn/pointer_set.h"
 #include "tools/gn/target.h"
 #include "tools/gn/unique_vector.h"
 
 class BuildSettings;
 class Config;
 class LabelPattern;
 class Setup;
 class SourceFile;
 class Target;
 class Toolchain;
@@ skipping 143 matching lines @@
     "      ignored.\n"
 
 // Applies any testonly and type filters specified on the command line,
 // and prints the targets as specified by the --as command line flag.
 //
 // If indent is true, the results will be indented two spaces.
 //
 // The vector will be modified so that only the printed targets will remain.
 void FilterAndPrintTargets(bool indent, std::vector<const Target*>* targets);
 void FilterAndPrintTargetSet(bool indent,
-                             const std::set<const Target*>& targets);
+                             const PointerSet<const Target>& targets);
 
 }  // namespace commands
 
 #endif  // TOOLS_GN_COMMANDS_H_