Add "Site Settings" option to Clear Browsing Data on Android

components/browsing_data/core/counters/site_settings_counter.cc

+// 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 "components/browsing_data/core/counters/site_settings_counter.h"
+
+#include "components/browsing_data/core/pref_names.h"
+#include "components/content_settings/core/browser/content_settings_registry.h"
+
+namespace browsing_data {
+
+SiteSettingsCounter::SiteSettingsCounter(HostContentSettingsMap* map)
+    : map_(map) {
+  DCHECK(map_);
+}
+
+SiteSettingsCounter::~SiteSettingsCounter() {}
+
+void SiteSettingsCounter::OnInitialized() {}
+
+const char* SiteSettingsCounter::GetPrefName() const {
+  return browsing_data::prefs::kDeleteSiteSettings;
+}
+
+void SiteSettingsCounter::Count() {
+  std::set<ContentSettingsPattern> patterns;
+  base::Time period_start = GetPeriodStart();
+  auto* registry = content_settings::ContentSettingsRegistry::GetInstance();
+  for (const content_settings::ContentSettingsInfo* info : *registry) {
+    ContentSettingsType type = info->website_settings_info()->type();
+    ContentSettingsForOneType content_settings_list;
+    map_->GetSettingsForOneType(type, content_settings::ResourceIdentifier(),
+                                &content_settings_list);
+    for (const auto& content_setting : content_settings_list) {
+      if (content_setting.source == "preference") {
+        base::Time last_modified = map_->GetSettingLastModifiedDate(
+            content_setting.primary_pattern, content_setting.secondary_pattern,
+            type);
+        if (last_modified >= period_start) {
+          patterns.insert(content_setting.primary_pattern);
+        }
+      }
+    }
+  }
+  ReportResult(patterns.size());
+}
+
+}  // namespace browsing_data