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

chrome/browser/browsing_data/browsing_data_counter_utils.h

Index: chrome/browser/browsing_data/browsing_data_counter_utils.h
diff --git a/chrome/browser/browsing_data/browsing_data_counter_utils.h b/chrome/browser/browsing_data/browsing_data_counter_utils.h
index da576dcd491babbef48e660ee936c4c0ecac06fa..a6a417b857ec13ef519e18d53e533315e7837bc7 100644
--- a/chrome/browser/browsing_data/browsing_data_counter_utils.h
+++ b/chrome/browser/browsing_data/browsing_data_counter_utils.h
@@ -12,6 +12,9 @@
 // Whether the browsing data counters experiment is enabled.
 bool AreCountersEnabled();
 
+// Whether the site data counter is enabled.
+bool IsSiteDataCounterEnabled();
+
 // Constructs the text to be displayed by a counter from the given |result|.
 base::string16 GetChromeCounterTextFromResult(
     const browsing_data::BrowsingDataCounter::Result* result);