Add TestBrowserThreadBundle into RenderViewHostTestHarness. Kill some unnecessary real threads.

chrome/browser/extensions/api/web_request/web_request_permissions_unittest.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/browser/extensions/api/web_request/web_request_permissions.h"
 
 #include "base/message_loop.h"
 #include "chrome/browser/extensions/extension_info_map.h"
 #include "chrome/common/extensions/extension_constants.h"
 #include "chrome/common/extensions/extension_manifest_constants.h"
 #include "chrome/common/extensions/extension_test_util.h"
 #include "chrome/test/base/testing_profile.h"
 #include "content/public/browser/resource_request_info.h"
-#include "content/public/test/test_browser_thread.h"
+#include "content/public/test/test_browser_thread_bundle.h"
 #include "net/url_request/url_request_test_util.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using content::ResourceRequestInfo;
 using extensions::Extension;
 using extensions::Manifest;
 using extension_test_util::LoadManifestUnchecked;
 
 class ExtensionWebRequestHelpersTestWithThreadsTest : public testing::Test {
  public:
   ExtensionWebRequestHelpersTestWithThreadsTest()
-      : io_thread_(content::BrowserThread::IO, &message_loop_) {}
+      : thread_bundle_(content::TestBrowserThreadBundle::IO_MAINLOOP) {}
 
  protected:
   virtual void SetUp() OVERRIDE;
 
  protected:
   net::TestURLRequestContext context;
 
   // This extension has Web Request permissions, but no host permission.
   scoped_refptr<Extension> permissionless_extension_;
   // This extension has Web Request permissions, and *.com a host permission.
   scoped_refptr<Extension> com_extension_;
   scoped_refptr<ExtensionInfoMap> extension_info_map_;
 
  private:
-  base::MessageLoopForIO message_loop_;
-  content::TestBrowserThread io_thread_;
+  content::TestBrowserThreadBundle thread_bundle_;
 };
 
 void ExtensionWebRequestHelpersTestWithThreadsTest::SetUp() {
   testing::Test::SetUp();
 
   std::string error;
   permissionless_extension_ = LoadManifestUnchecked("permissions",
                                                     "web_request_no_host.json",
                                                     Manifest::INVALID_LOCATION,
                                                     Extension::NO_FLAGS,
@@ skipping 113 matching lines @@
       request.url(),
       false /*crosses_incognito*/,
       WebRequestPermissions::REQUIRE_HOST_PERMISSION));
   EXPECT_FALSE(WebRequestPermissions::CanExtensionAccessURL(
       extension_info_map_.get(),
       com_extension_->id(),
       request.url(),
       false /*crosses_incognito*/,
       WebRequestPermissions::REQUIRE_ALL_URLS));
 }