[Extensions] Remove ExtensionFunction::SetError()

chrome/browser/extensions/api/sessions/sessions_api.cc

 // Copyright 2013 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/extensions/api/sessions/sessions_api.h"
 
 #include <stddef.h>
 
 #include <utility>
 #include <vector>
@@ skipping 383 matching lines @@
   std::unique_ptr<tabs::Tab> tab(
       ExtensionTabUtil::CreateTabObject(contents, extension()));
   std::unique_ptr<api::sessions::Session> restored_session(
       CreateSessionModelHelper(base::Time::Now().ToTimeT(), std::move(tab),
                                std::unique_ptr<windows::Window>()));
   results_ = Restore::Results::Create(*restored_session);
 }
 
 bool SessionsRestoreFunction::SetResultRestoredWindow(int window_id) {
   WindowController* controller = NULL;
-  if (!windows_util::GetWindowFromWindowID(this, window_id, 0, &controller)) {
-    // error_ is set by GetWindowFromWindowId function call.
+  if (!windows_util::GetWindowFromWindowID(this, window_id, 0, &controller,
+                                           &error_)) {
     return false;
   }
   std::unique_ptr<base::DictionaryValue> window_value(
       controller->CreateWindowValueWithTabs(extension()));
   std::unique_ptr<windows::Window> window(
       windows::Window::FromValue(*window_value));
   results_ = Restore::Results::Create(*CreateSessionModelHelper(
       base::Time::Now().ToTimeT(), std::unique_ptr<tabs::Tab>(),
       std::move(window)));
   return true;
@@ skipping 211 matching lines @@
   return g_factory.Pointer();
 }
 
 void SessionsAPI::OnListenerAdded(const EventListenerInfo& details) {
   sessions_event_router_.reset(
       new SessionsEventRouter(Profile::FromBrowserContext(browser_context_)));
   EventRouter::Get(browser_context_)->UnregisterObserver(this);
 }
 
 }  // namespace extensions