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..df2aebe13c542222e814053a5f704f57fc8e61b0 100644
--- a/chrome/browser/webdata/autofill_table.h
+++ b/chrome/browser/webdata/autofill_table.h
@@ -154,8 +154,13 @@ class AutofillTable : public WebDatabaseTable {
                                       const base::Time& delete_end,
                                       std::vector<AutofillChange>* changes);
 
+  // Removes rows from autofill_dates if they were accessed strictly before
+  // |delete_end|. Removes corresponding row from autofill table.
+  bool RemoveFormElementsAccessedBefore(const base::Time& delete_end,
+                                        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,
@@ -187,6 +192,9 @@ 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);