gn: Make generation of main build.ninja file deterministic.

tools/gn/builder.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_BUILDER_H_
 #define TOOLS_GN_BUILDER_H_
 
 #include "base/callback.h"
 #include "base/containers/hash_tables.h"
 #include "base/macros.h"
@@ skipping 112 matching lines @@
   // Given a list of unresolved records, tries to find any circular
   // dependencies and returns the string describing the problem. If no circular
   // deps were found, returns the empty string.
   std::string CheckForCircularDependencies(
       const std::vector<const BuilderRecord*>& bad_records) const;
 
   // Non owning pointer.
   Loader* loader_;
 
   // Owning pointers.
-  typedef base::hash_map<Label, BuilderRecord*> RecordMap;
+  typedef std::map<Label, BuilderRecord*> RecordMap;

[Nico, 2016/11/06 22:18:10]

Label has an operator<, so just use that ordering.

   RecordMap records_;
 
   ResolvedGeneratedCallback resolved_and_generated_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(Builder);
 };
 
 #endif  // TOOLS_GN_BUILDER_H_