Convert //tools to use std::unique_ptr

extensions/renderer/display_source_custom_bindings.h

 // Copyright 2015 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 EXTENSIONS_RENDERER_DISPLAY_SOURCE_CUSTOM_BINDINGS_H_
 #define EXTENSIONS_RENDERER_DISPLAY_SOURCE_CUSTOM_BINDINGS_H_
 
 #include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
 #include "extensions/common/api/display_source.h"
 #include "extensions/renderer/api/display_source/display_source_session.h"
 #include "extensions/renderer/object_backed_native_handler.h"
 #include "v8/include/v8.h"
 
 namespace extensions {
 class ScriptContext;
 
 // Implements custom bindings for the displaySource API.
 class DisplaySourceCustomBindings : public ObjectBackedNativeHandler {
@@ skipping 34 matching lines @@
 
   std::map<int, scoped_ptr<DisplaySourceSession>> session_map_;
   base::WeakPtrFactory<DisplaySourceCustomBindings> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DisplaySourceCustomBindings);
 };
 
 }  // extensions
 
 #endif  // EXTENSIONS_RENDERER_DISPLAY_SOURCE_CUSTOM_BINDINGS_H_