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

components/content_settings/core/browser/host_content_settings_map.cc

Index: components/content_settings/core/browser/host_content_settings_map.cc
diff --git a/components/content_settings/core/browser/host_content_settings_map.cc b/components/content_settings/core/browser/host_content_settings_map.cc
index 4ebb241f3843046d1966fcd6115e62ae5751605d..6e7c0c9d8e180dfa941992becbfb04c892a1ab4c 100644
--- a/components/content_settings/core/browser/host_content_settings_map.cc
+++ b/components/content_settings/core/browser/host_content_settings_map.cc
@@ -725,6 +725,21 @@ void HostContentSettingsMap::ClearSettingsForOneType(
   FlushLossyWebsiteSettings();
 }
 
+std::vector<GURL> HostContentSettingsMap::GetSitesWithSettingsInPrefProvider(

[msramek, 2017/01/09 12:54:44]

The website settings that are part of REMOVE_SITE_DATA (APP_BANNER,
SITE_ENGAGEMENT, DURABLE_STORAGE) can't be managed by policies or extensions,
therefore you can assume they all come from PrefProvider.

We can remove this and instead use
HostContentSettingsMap::HostContentSettingsMap::GetSettingsForOneType (and then
do the pattern->url conversion on the caller side).

[dullweber, 2017/01/09 16:05:46]

Done.

+    ContentSettingsType content_type) {
+  std::set<GURL> origins;
+
+  std::unique_ptr<content_settings::RuleIterator> rule_iterator(
+      pref_provider_->GetRuleIterator(content_type, std::string(), false));
+  if (rule_iterator) {
+    while (rule_iterator->HasNext()) {
+      content_settings::Rule rule = rule_iterator->Next();
+      origins.insert(GURL(rule.primary_pattern.ToString()));
+    }
+  }
+  return std::vector<GURL>(origins.begin(), origins.end());
+}
+
 void HostContentSettingsMap::ClearSettingsForOneTypeWithPredicate(
     ContentSettingsType content_type,
     const base::Callback<bool(const ContentSettingsPattern& primary_pattern,