Switch to standard integer types in extensions/.

extensions/renderer/renderer_extension_registry.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_RENDERER_EXTENSION_REGISTRY_H_
 #define EXTENSIONS_RENDERER_RENDERER_EXTENSION_REGISTRY_H_
 
+#include <stddef.h>
+
 #include <string>
 
+#include "base/macros.h"
 #include "base/synchronization/lock.h"
 #include "extensions/common/extension_set.h"
 
 class GURL;
 
 namespace extensions {
 
 // Thread safe container for all loaded extensions in this process,
 // essentially the renderer counterpart to ExtensionRegistry.
 class RendererExtensionRegistry {
@@ skipping 30 matching lines @@
   ExtensionSet extensions_;
 
   mutable base::Lock lock_;
 
   DISALLOW_COPY_AND_ASSIGN(RendererExtensionRegistry);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_RENDERER_RENDERER_EXTENSION_REGISTRY_H_