Switch to standard integer types in base/.

base/observer_list.h

 // Copyright (c) 2011 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 BASE_OBSERVER_LIST_H_
 #define BASE_OBSERVER_LIST_H_
 
+#include <stddef.h>
+
 #include <algorithm>
 #include <limits>
 #include <vector>
 
-#include "base/basictypes.h"
 #include "base/logging.h"
+#include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "base/stl_util.h"
 
 ///////////////////////////////////////////////////////////////////////////////
 //
 // OVERVIEW:
 //
 //   A container for a list of observers.  Unlike a normal STL vector or list,
 //   this container can be modified during iteration without invalidating the
 //   iterator.  So, it safely handles the case of an observer removing itself
@@ skipping 214 matching lines @@
           &observer_list);                                               \
       ObserverType* obs;                                                 \
       while ((obs = it_inside_observer_macro.GetNext()) != nullptr)      \
         obs->func;                                                       \
     }                                                                    \
   } while (0)
 
 }  // namespace base
 
 #endif  // BASE_OBSERVER_LIST_H_