Create an AutofillBackend interface

components/autofill/browser/webdata/autofill_webdata_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 "components/autofill/browser/webdata/autofill_webdata_service.h"
 
 #include "base/logging.h"
 #include "base/stl_util.h"
 #include "components/autofill/browser/autofill_country.h"
 #include "components/autofill/browser/autofill_profile.h"
@@ skipping 19 matching lines @@
 
   if (!web_data_service)
     return;
 
   BrowserThread::PostTask(
       BrowserThread::UI, FROM_HERE,
       Bind(&AutofillWebDataService::NotifyAutofillMultipleChangedOnUIThread,
            make_scoped_refptr(web_data_service)));
 }
 
+

[Ilya Sherman, 2013/05/07 00:02:43]

nit: Spurious newline

[Cait (Slow), 2013/05/07 19:22:07]

Done.

 AutofillWebDataService::AutofillWebDataService(
     scoped_refptr<WebDatabaseService> wdbs,
     const ProfileErrorCallback& callback)
     : WebDataServiceBase(wdbs, callback),
+      weak_ptr_factory_(this),
       autofill_backend_(new AutofillWebDataBackend()) {
 }
 
 AutofillWebDataService::AutofillWebDataService()
     : WebDataServiceBase(NULL,
                          WebDataServiceBase::ProfileErrorCallback()),
+      weak_ptr_factory_(this),
       autofill_backend_(new AutofillWebDataBackend()) {
 }
 
 void AutofillWebDataService::ShutdownOnUIThread() {
+  weak_ptr_factory_.InvalidateWeakPtrs();
   BrowserThread::PostTask(
     BrowserThread::DB, FROM_HERE,
     base::Bind(&AutofillWebDataService::ShutdownOnDBThread, this));
   WebDataServiceBase::ShutdownOnUIThread();
 }
 
+void AutofillWebDataService::GetDelegateOnDB(
+    const DelegateOnDBCallback& del_callback) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  base::Closure on_changed_callback = Bind(
+      &AutofillWebDataService::NotifyAutofillMultipleChangedOnUIThread,
+      weak_ptr_factory_.GetWeakPtr());
+  wdbs_->GetDatabaseOnDB(
+      Bind(&AutofillWebDataBackend::GetDelegate, autofill_backend_,
+           del_callback, on_changed_callback));
+}
+
 void AutofillWebDataService::AddFormFields(
     const std::vector<FormFieldData>& fields) {
   wdbs_->ScheduleDBTask(FROM_HERE,
       Bind(&AutofillWebDataBackend::AddFormElements,
            autofill_backend_, fields));
 }
 
 WebDataServiceBase::Handle AutofillWebDataService::GetFormValuesForElementName(
     const base::string16& name, const base::string16& prefix, int limit,
     WebDataServiceConsumer* consumer) {
@@ skipping 94 matching lines @@
     autofill_backend_->AddObserver(observer);
 }
 
 void AutofillWebDataService::RemoveObserver(
     AutofillWebDataServiceObserverOnDBThread* observer) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::DB));
   if (autofill_backend_)
     autofill_backend_->RemoveObserver(observer);
 }
 
+

[Jói, 2013/05/06 23:08:39]

spurious added blank line?

[Cait (Slow), 2013/05/07 19:22:07]

Done.

 void AutofillWebDataService::AddObserver(
     AutofillWebDataServiceObserverOnUIThread* observer) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   ui_observer_list_.AddObserver(observer);
 }
 
 void AutofillWebDataService::RemoveObserver(
     AutofillWebDataServiceObserverOnUIThread* observer) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   ui_observer_list_.RemoveObserver(observer);
@@ skipping 16 matching lines @@
 }
 
 void AutofillWebDataService::NotifyAutofillMultipleChangedOnUIThread() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   FOR_EACH_OBSERVER(AutofillWebDataServiceObserverOnUIThread,
                     ui_observer_list_,
                     AutofillMultipleChanged());
 }
 
 }  // namespace autofill