Cull autofill entries older than 60 days.

chrome/browser/autofill/personal_data_manager.cc

Index: chrome/browser/autofill/personal_data_manager.cc
diff --git a/chrome/browser/autofill/personal_data_manager.cc b/chrome/browser/autofill/personal_data_manager.cc
index f291cf9f3a31ae70980284da0875bf289bc44fa5..fe2b36bc188b083ab374944301833030aa7cc2d8 100644
--- a/chrome/browser/autofill/personal_data_manager.cc
+++ b/chrome/browser/autofill/personal_data_manager.cc
@@ -23,6 +23,7 @@
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/sync/profile_sync_service.h"
 #include "chrome/browser/sync/profile_sync_service_factory.h"
+#include "chrome/browser/webdata/autofill_entry.h"
 #include "chrome/browser/webdata/web_data_service.h"
 #include "chrome/common/chrome_notification_types.h"
 #include "chrome/common/pref_names.h"
@@ -161,6 +162,23 @@ void PersonalDataManager::OnWebDataServiceRequestDone(
     AutofillProfile::AdjustInferredLabels(&profile_pointers);
     FOR_EACH_OBSERVER(PersonalDataManagerObserver, observers_,
                       OnPersonalDataChanged());
+
+    // As all Autofill data is ready, the Autocomplete data is ready as well.
+    // If sync is not set, cull older entries of the autocomplete. Otherwise,
+    // the entries will be culled when sync is connected.
+    ProfileSyncService* sync_service =
+        ProfileSyncServiceFactory::GetInstance()->GetForProfile(profile_);
+    if (sync_service && (!sync_service->HasSyncSetupCompleted() ||
+        !profile_->GetPrefs()->GetBoolean(prefs::kSyncAutofill))) {
+      WebDataService* wds =
+          profile_->GetWebDataService(Profile::EXPLICIT_ACCESS);
+      if (wds) {
+        wds->RemoveFormElementsAccessedBefore(

[Ilya Sherman, 2012/03/15 21:00:41]

nit: Can we make this interface simply be "wds->RemoveExpiredFormElements()" and
avoid exposing the "AutofillEntry::kExpirationPeriodInDays" constant?

[GeorgeY, 2012/03/17 00:36:16]

Yes, done

+            base::Time::Now() -
+               base::TimeDelta::FromDays(
+                   AutofillEntry::kExpirationPeriodInDays));
+      }
+    }
   }
 }