Cull autofill entries older than 60 days.

chrome/browser/webdata/autofill_table.h

Index: chrome/browser/webdata/autofill_table.h
diff --git a/chrome/browser/webdata/autofill_table.h b/chrome/browser/webdata/autofill_table.h
index 4430f17cba4472d8c404c74898a51a207ed339ff..97a8e2b4d0859b2bb7025707e96341678ecff036 100644
--- a/chrome/browser/webdata/autofill_table.h
+++ b/chrome/browser/webdata/autofill_table.h
@@ -154,8 +154,14 @@ class AutofillTable : public WebDatabaseTable {
                                       const base::Time& delete_end,
                                       std::vector<AutofillChange>* changes);
 
+  // Removes rows from autofill_dates if they were accessed strictly before
+  // |AutofillEntry::ExpirationTime()|. Removes the corresponding row from the
+  // autofill table. Also culls timestamps to only two. TODO(georgey): remove
+  // culling in future versions.
+  bool RemoveExpiredFormElements(std::vector<AutofillChange>* changes);
+
   // Removes from autofill_dates rows with given pair_id where date_created lies
-  // between delte_begin and delte_end.
+  // between |delete_begin| and |delete_end|.
   bool RemoveFormElementForTimeRange(int64 pair_id,
                                      const base::Time& delete_begin,
                                      const base::Time& delete_end,
@@ -166,6 +172,11 @@ class AutofillTable : public WebDatabaseTable {
   // |was_removed| out parameter to true if the count becomes 0.
   bool AddToCountOfFormElement(int64 pair_id, int delta, bool* was_removed);
 
+  // Counts how many timestamp data rows are in the |autofill_dates| table for
+  // a given |pair_id|. GetCountOfFormElement() on the other hand gives the
+  // |count| property for a given id.
+  int CountTimestampsData(int64 pair_id);
+
   // Gets the pair_id and count entries from name and value specified in
   // |element|.  Sets *pair_id and *count to 0 if there is no such row in
   // the table.
@@ -187,6 +198,9 @@ class AutofillTable : public WebDatabaseTable {
   // Adds a new row to the autofill_dates table.
   bool InsertPairIDAndDate(int64 pair_id, const base::Time& date_created);
 
+  // Deletes last access to the Autofill data from the autofill_dates table.
+  bool DeleteLastAccess(int64 pair_id);
+
   // Removes row from the autofill tables given |pair_id|.
   bool RemoveFormElementForID(int64 pair_id);