Improve unit testing of socket API.

chrome/test/base/browser_with_test_window_test.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 "chrome/test/base/browser_with_test_window_test.h"
 
 #include "base/synchronization/waitable_event.h"
 #include "chrome/browser/profiles/profile_destroyer.h"
 #include "chrome/browser/ui/browser_navigator.h"
 #include "chrome/browser/ui/browser_tabstrip.h"
@@ skipping 15 matching lines @@
 using content::NavigationController;
 using content::RenderViewHost;
 using content::RenderViewHostTester;
 using content::WebContents;
 
 BrowserWithTestWindowTest::BrowserWithTestWindowTest()
     : ui_thread_(BrowserThread::UI, message_loop()),
       db_thread_(BrowserThread::DB),
       file_thread_(BrowserThread::FILE, message_loop()),
       file_user_blocking_thread_(
-          BrowserThread::FILE_USER_BLOCKING, message_loop()) {
+          BrowserThread::FILE_USER_BLOCKING, message_loop()),
+      io_thread_(BrowserThread::IO, message_loop()) {
   db_thread_.Start();
 }
 
 void BrowserWithTestWindowTest::SetUp() {
   testing::Test::SetUp();
 
   set_profile(CreateProfile());
   browser_.reset(new Browser(Browser::TYPE_TABBED, profile()));
   window_.reset(new TestBrowserWindow(browser()));
   browser_->SetWindowForTesting(window_.get());
@@ skipping 106 matching lines @@
   // Destroy the profile here - otherwise, if the profile is freed in the
   // destructor, and a test subclass owns a resource that the profile depends
   // on (such as g_browser_process()->local_state()) there's no way for the
   // subclass to free it after the profile.
   profile_.reset(NULL);
 }
 
 TestingProfile* BrowserWithTestWindowTest::CreateProfile() {
   return new TestingProfile();
 }