Convert //tools to use std::unique_ptr

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 15 matching lines @@
   explicit Builder(Loader* loader);
 
   // The resolved callback is called whenever a target has been resolved. This
   // will be executed only on the main thread.
   void set_resolved_callback(const ResolvedCallback& cb) {
     resolved_callback_ = cb;
   }
 
   Loader* loader() const { return loader_; }
 
-  void ItemDefined(scoped_ptr<Item> item);
+  void ItemDefined(std::unique_ptr<Item> item);
 
   // Returns NULL if there is not a thing with the corresponding label.
   const Item* GetItem(const Label& label) const;
   const Toolchain* GetToolchain(const Label& label) const;
 
   std::vector<const BuilderRecord*> GetAllRecords() const;
 
   // Returns targets which should be generated and which are defined.
   std::vector<const Target*> GetAllResolvedTargets() const;
 
@@ skipping 85 matching lines @@
   // Owning pointers.
   typedef base::hash_map<Label, BuilderRecord*> RecordMap;
   RecordMap records_;
 
   ResolvedCallback resolved_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(Builder);
 };
 
 #endif  // TOOLS_GN_BUILDER_H_