Add probability of culling if sync is enabled to https://chromiumcodereview.appspot.com/9585020/ In…

chrome/browser/webdata/web_data_service.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/webdata/web_data_service.h"
 
 #include "base/bind.h"
 #include "base/message_loop.h"
 #include "base/stl_util.h"
 #include "base/threading/thread.h"
@@ skipping 497 matching lines @@
                                     GetNextRequestHandle(),
                                     NULL,
                                     delete_begin,
                                     delete_end);
   RegisterRequest(request);
   ScheduleTask(FROM_HERE,
                Bind(&WebDataService::RemoveFormElementsAddedBetweenImpl,
                     this, request));
 }
 
+void WebDataService::RemoveExpiredFormElements() {
+  WebDataRequest* request =
+      new WebDataRequest(this, GetNextRequestHandle(), NULL);
+  RegisterRequest(request);
+  ScheduleTask(FROM_HERE,
+               Bind(&WebDataService::RemoveExpiredFormElementsImpl,
+                    this, request));
+}
+
 void WebDataService::RemoveFormValueForElementName(
     const string16& name, const string16& value) {
   GenericRequest2<string16, string16>* request =
       new GenericRequest2<string16, string16>(this,
                                               GetNextRequestHandle(),
                                               NULL,
                                               name, value);
   RegisterRequest(request);
   ScheduleTask(FROM_HERE,
                Bind(&WebDataService::RemoveFormValueForElementNameImpl,
@@ skipping 723 matching lines @@
             chrome::NOTIFICATION_AUTOFILL_ENTRIES_CHANGED,
             content::Source<WebDataService>(this),
             content::Details<AutofillChangeList>(&changes));
       }
       ScheduleCommit();
     }
   }
   request->RequestComplete();
 }
 
+void WebDataService::RemoveExpiredFormElementsImpl(WebDataRequest* request) {
+  InitializeDatabaseIfNecessary();
+  if (db_ && !request->IsCancelled(NULL)) {
+    AutofillChangeList changes;
+    if (db_->GetAutofillTable()->RemoveExpiredFormElements(&changes)) {
+      if (!changes.empty()) {
+        request->SetResult(
+            new WDResult<AutofillChangeList>(AUTOFILL_CHANGES, changes));
+
+        // Post the notifications including the list of affected keys.
+        // This is sent here so that work resulting from this notification
+        // will be done on the DB thread, and not the UI thread.
+        content::NotificationService::current()->Notify(
+            chrome::NOTIFICATION_AUTOFILL_ENTRIES_CHANGED,
+            content::Source<WebDataService>(this),
+            content::Details<AutofillChangeList>(&changes));
+      }
+      ScheduleCommit();
+    }
+  }
+  request->RequestComplete();
+}
+
 void WebDataService::RemoveFormValueForElementNameImpl(
     GenericRequest2<string16, string16>* request) {
   InitializeDatabaseIfNecessary();
   if (db_ && !request->IsCancelled(NULL)) {
     const string16& name = request->arg1();
     const string16& value = request->arg2();
 
     if (db_->GetAutofillTable()->RemoveFormElement(name, value)) {
       AutofillChangeList changes;
       changes.push_back(AutofillChange(AutofillChange::REMOVE,
@@ skipping 349 matching lines @@
 }
 
 const WDTypedResult* WebDataService::WebDataRequest::GetResult() const {
   return result_;
 }
 
 void WebDataService::WebDataRequest::RequestComplete() {
   message_loop_->PostTask(FROM_HERE, Bind(&WebDataService::RequestCompleted,
                                           service_.get(), handle_));
 }