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

components/content_settings/core/browser/host_content_settings_map.h

Index: components/content_settings/core/browser/host_content_settings_map.h
diff --git a/components/content_settings/core/browser/host_content_settings_map.h b/components/content_settings/core/browser/host_content_settings_map.h
index b74865acb39abbfc5c6760930572de5c19dc477e..3888e089564d48ffbea050e4e4300d8685f4bbe7 100644
--- a/components/content_settings/core/browser/host_content_settings_map.h
+++ b/components/content_settings/core/browser/host_content_settings_map.h
@@ -218,6 +218,11 @@ class HostContentSettingsMap : public content_settings::Observer,
   // This should only be called on the UI thread.
   void ClearSettingsForOneType(ContentSettingsType content_type);
 
+  // Returns a list of |origins| with that have a setting for |content_type|
+  // stored in the pref provider.
+  std::vector<GURL> GetSitesWithSettingsInPrefProvider(
+      ContentSettingsType content_type);
+
   // If |pattern_predicate| is null, this method is equivalent to the above.
   // Otherwise, it only deletes exceptions matched by |pattern_predicate|.
   void ClearSettingsForOneTypeWithPredicate(