Update SupportsUserData uses with unique_ptr.

content/renderer/internal_document_state_data.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 CONTENT_RENDERER_INTERNAL_DOCUMENT_STATE_DATA_H_
 #define CONTENT_RENDERER_INTERNAL_DOCUMENT_STATE_DATA_H_
 
 #include <memory>
 #include <string>
 
 #include "base/macros.h"
 #include "base/supports_user_data.h"
 #include "third_party/WebKit/public/platform/WebCachePolicy.h"
 #include "url/gurl.h"
 
 namespace blink {
 class WebDataSource;
 enum class WebCachePolicy;
 }
 
 namespace content {
 
 class DocumentState;
 
 // Stores internal state per WebDataSource.
 class InternalDocumentStateData : public base::SupportsUserData::Data {
  public:
   InternalDocumentStateData();
+  ~InternalDocumentStateData() override;
 
   static InternalDocumentStateData* FromDataSource(blink::WebDataSource* ds);
   static InternalDocumentStateData* FromDocumentState(DocumentState* ds);
 
   int http_status_code() const { return http_status_code_; }
   void set_http_status_code(int http_status_code) {
     http_status_code_ = http_status_code;
   }
 
   const GURL& searchable_form_url() const { return searchable_form_url_; }
@@ skipping 31 matching lines @@
     return cache_policy_override_;
   }
   void clear_cache_policy_override() {
     cache_policy_override_set_ = false;
     cache_policy_override_ = blink::WebCachePolicy::kUseProtocolCachePolicy;
   }
   bool is_cache_policy_override_set() const {
     return cache_policy_override_set_;
   }
 
- protected:
-  ~InternalDocumentStateData() override;
-
  private:
   int http_status_code_;
   GURL searchable_form_url_;
   std::string searchable_form_encoding_;
   bool is_overriding_user_agent_;
   bool must_reset_scroll_and_scale_state_;
   bool cache_policy_override_set_;
   blink::WebCachePolicy cache_policy_override_;
 
   DISALLOW_COPY_AND_ASSIGN(InternalDocumentStateData);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_INTERNAL_DOCUMENT_STATE_DATA_H_