[Sync] Inject startup dependencies into StartupController.

components/browser_sync/browser/profile_sync_service.cc

Index: components/browser_sync/browser/profile_sync_service.cc
diff --git a/components/browser_sync/browser/profile_sync_service.cc b/components/browser_sync/browser/profile_sync_service.cc
index 4c475cb1b2eb2baffd26665070dedc973027a366..81adc07fc78ee79fefd75390242d7aa5d8643f9b 100644
--- a/components/browser_sync/browser/profile_sync_service.cc
+++ b/components/browser_sync/browser/profile_sync_service.cc
@@ -261,7 +261,8 @@ void ProfileSyncService::Initialize() {
   sync_client_->Initialize();
 
   startup_controller_.reset(new browser_sync::StartupController(
-      oauth2_token_service_, &sync_prefs_, signin_.get(),
+      &sync_prefs_,
+      base::Bind(&ProfileSyncService::CanBackendStart, base::Unretained(this)),
       base::Bind(&ProfileSyncService::StartUpSlowBackendComponents,
                  startup_controller_weak_factory_.GetWeakPtr())));
   scoped_ptr<browser_sync::LocalSessionEventRouter> router(
@@ -1534,6 +1535,12 @@ bool ProfileSyncService::IsSignedIn() const {
   return !signin_->GetAccountIdToUse().empty();
 }
 
+bool ProfileSyncService::CanBackendStart() const {
+  return CanSyncStart() && oauth2_token_service_ &&
+         oauth2_token_service_->RefreshTokenIsAvailable(
+             signin_->GetAccountIdToUse());
+}
+
 bool ProfileSyncService::IsBackendInitialized() const {
   return backend_initialized_;
 }