Count number of origins with data affected by clearing "cookies and site data".

chrome/browser/browsing_data/site_data_counter.h

+// Copyright 2017 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 CHROME_BROWSER_BROWSING_DATA_SITE_DATA_COUNTER_H_
+#define CHROME_BROWSER_BROWSING_DATA_SITE_DATA_COUNTER_H_
+
+#include "base/memory/weak_ptr.h"
+#include "components/browsing_data/core/counters/browsing_data_counter.h"
+
+class Profile;
+
+class SiteDataCounter : public browsing_data::BrowsingDataCounter {
+ public:
+  explicit SiteDataCounter(Profile* profile);
+  ~SiteDataCounter() override;
+
+  const char* GetPrefName() const override;
+
+ private:
+  void Count() override;
+  void Done(int origin_count);
+
+  Profile* profile_;
+  base::WeakPtrFactory<SiteDataCounter> weak_ptr_factory_;
+};
+
+#endif  // CHROME_BROWSER_BROWSING_DATA_SITE_DATA_COUNTER_H_