Allow customization of HttpPostProviderFactory via ProfileSyncService

chrome/browser/sync/glue/sync_backend_host.h

Index: chrome/browser/sync/glue/sync_backend_host.h
diff --git a/chrome/browser/sync/glue/sync_backend_host.h b/chrome/browser/sync/glue/sync_backend_host.h
index dbfee7d6cf477ca9d018ac538c2f1d9393432b8f..a47d8c64671349619751581df5d4c3f2e1dd160f 100644
--- a/chrome/browser/sync/glue/sync_backend_host.h
+++ b/chrome/browser/sync/glue/sync_backend_host.h
@@ -29,6 +29,7 @@ class MessageLoop;
 }
 
 namespace syncer {
+class HttpPostProviderFactoryFactory;
 class SyncManagerFactory;
 }
 
@@ -66,7 +67,9 @@ class SyncBackendHost : public BackendDataTypeConfigurer {
       scoped_ptr<syncer::SyncManagerFactory> sync_manager_factory,
       scoped_ptr<syncer::UnrecoverableErrorHandler> unrecoverable_error_handler,
       syncer::ReportUnrecoverableErrorFunction
-          report_unrecoverable_error_function) = 0;
+          report_unrecoverable_error_function,
+      syncer::HttpPostProviderFactoryFactory*
+          http_post_provider_factory_factory) = 0;
 
   // Called on the frontend's thread to update SyncCredentials.
   virtual void UpdateCredentials(