tools/gn: Remove includes of basictypes.h.

tools/gn/template.h

 // Copyright 2014 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_TEMPLATE_H_
 #define TOOLS_GN_TEMPLATE_H_
 
 #include <vector>
 
-#include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 
 class BlockNode;
 class Err;
 class FunctionCallNode;
 class LocationRange;
 class Scope;
 class Value;
 
@@ skipping 27 matching lines @@
   friend class base::RefCountedThreadSafe<Template>;
 
   Template();
   ~Template();
 
   scoped_ptr<Scope> closure_;
   const FunctionCallNode* definition_;
 };
 
 #endif  // TOOLS_GN_TEMPLATE_H_