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

chrome/browser/browsing_data/site_data_counter.cc

Index: chrome/browser/browsing_data/site_data_counter.cc
diff --git a/chrome/browser/browsing_data/site_data_counter.cc b/chrome/browser/browsing_data/site_data_counter.cc
new file mode 100644
index 0000000000000000000000000000000000000000..36397fdae8fcbcb3bfa3b945b6336c6097e6cabc
--- /dev/null
+++ b/chrome/browser/browsing_data/site_data_counter.cc
@@ -0,0 +1,35 @@
+// 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.
+
+#include "chrome/browser/browsing_data/site_data_counter.h"
+
+#include "chrome/browser/browsing_data/site_data_counting_helper.h"
+#include "components/browsing_data/core/pref_names.h"
+#include "content/public/browser/browser_thread.h"
+
+using content::BrowserThread;
+
+SiteDataCounter::SiteDataCounter(Profile* profile)
+    : profile_(profile), weak_ptr_factory_(this) {}
+
+SiteDataCounter::~SiteDataCounter() {}
+
+const char* SiteDataCounter::GetPrefName() const {
+  return browsing_data::prefs::kDeleteCookies;
+}
+
+void SiteDataCounter::Count() {
+  base::Time begin = GetPeriodStart();
+  auto done_callback =
+      base::Bind(&SiteDataCounter::Done, weak_ptr_factory_.GetWeakPtr());
+  // Use a helper class that owns itself to avoid issues when SiteDataCounter is
+  // deleted before counting finished.
+  auto* helper = new SiteDataCountingHelper(profile_, begin, done_callback);
+  helper->CountAndDestroySelfWhenFinished();
+}
+
+void SiteDataCounter::Done(int origin_count) {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+  ReportResult(origin_count);
+}