Separate the syncing of extension settings and app settings into separate data

chrome/browser/extensions/extension_data_deleter.cc

Index: chrome/browser/extensions/extension_data_deleter.cc
diff --git a/chrome/browser/extensions/extension_data_deleter.cc b/chrome/browser/extensions/extension_data_deleter.cc
index 41f4cb91793a9140837cb211563091daaf307fbc..968ebfba167747f1b2e36dbaadcb7afdb16e3547 100644
--- a/chrome/browser/extensions/extension_data_deleter.cc
+++ b/chrome/browser/extensions/extension_data_deleter.cc
@@ -8,7 +8,6 @@
 #include "base/file_util.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/extensions/extension_service.h"
-#include "chrome/browser/extensions/extension_settings_backend.h"
 #include "chrome/browser/extensions/extension_settings_frontend.h"
 #include "chrome/common/chrome_constants.h"
 #include "chrome/common/extensions/extension.h"
@@ -65,9 +64,8 @@ void ExtensionDataDeleter::StartDeleting(
       base::Bind(
           &ExtensionDataDeleter::DeleteAppcachesOnIOThread, deleter));
 
-  profile->GetExtensionService()->extension_settings_frontend()->RunWithBackend(
-      base::Bind(
-          &ExtensionDataDeleter::DeleteExtensionSettingsOnFileThread, deleter));
+  profile->GetExtensionService()->extension_settings_frontend()->
+      DeleteStorageSoon(extension_id);
 }
 
 ExtensionDataDeleter::ExtensionDataDeleter(
@@ -143,9 +141,3 @@ void ExtensionDataDeleter::DeleteAppcachesOnIOThread() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
   appcache_service_->DeleteAppCachesForOrigin(storage_origin_, NULL);
 }
-
-void ExtensionDataDeleter::DeleteExtensionSettingsOnFileThread(
-    ExtensionSettingsBackend* backend) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
-  backend->DeleteExtensionData(extension_id_);
-}