Cull autofill entries older than 60 days.

chrome/browser/webdata/autofill_entry.h

Index: chrome/browser/webdata/autofill_entry.h
diff --git a/chrome/browser/webdata/autofill_entry.h b/chrome/browser/webdata/autofill_entry.h
index 8aae993ffd4b31747f5efc661195aca03581e7ff..8ba8908dbd72e492806b196eafa1477878d011a2 100644
--- a/chrome/browser/webdata/autofill_entry.h
+++ b/chrome/browser/webdata/autofill_entry.h
@@ -46,14 +46,21 @@ class AutofillEntry {
 
   bool timestamps_culled() const { return timestamps_culled_; }
 
+  // Checks if last of the timestamps are older than ExpirationTime().
+  bool IsExpired() const;
+
+  // The entries last accessed before this time should expire.
+  static base::Time ExpirationTime();
+
  private:
   FRIEND_TEST_ALL_PREFIXES(AutofillEntryTest, NoCulling);
   FRIEND_TEST_ALL_PREFIXES(AutofillEntryTest, Culling);
+  FRIEND_TEST_ALL_PREFIXES(AutofillEntryTest, CullByTime);
 
-  // Culls the list of timestamps to |kMaxAutofillTimeStamps| latest timestamps.
-  // Result is stored in |result|. If the original vtor's size is less
-  // than kMaxAutofillTimeStamps then false is returned. Otherwise true is
-  // returned. Note: source and result should be DIFFERENT vectors.
+  // Culls the list of timestamps to 2 - the oldest and most recent. This is a
+  // precursor to getting rid of the timestamps db altogether.
+  // See http://crbug.com/118696.
+  // |source| is expected to be sorted from oldest to newest.
   static bool CullTimeStamps(const std::vector<base::Time>& source,
                              std::vector<base::Time>* result);
 
@@ -62,6 +69,4 @@ class AutofillEntry {
   bool timestamps_culled_;
 };
 
-// TODO(lipalani): Move this inside the class defintion.
-const unsigned int kMaxAutofillTimeStamps = 50;
 #endif  // CHROME_BROWSER_WEBDATA_AUTOFILL_ENTRY_H__