Ensure tests have an active task runner

chrome/browser/ui/cocoa/profiles/avatar_menu_bubble_controller_unittest.mm

 // Copyright 2014 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.
 
 #import "chrome/browser/ui/cocoa/profiles/avatar_menu_bubble_controller.h"
 
 #include "base/command_line.h"
 #include "base/mac/scoped_nsobject.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_pump_mac.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/prefs/pref_service_syncable.h"
 #include "chrome/browser/profiles/avatar_menu.h"
 #include "chrome/browser/profiles/avatar_menu_observer.h"
 #include "chrome/browser/profiles/profile_info_cache.h"
 #import "chrome/browser/ui/cocoa/cocoa_test_helper.h"
 #include "chrome/test/base/testing_browser_process.h"
 #include "chrome/test/base/testing_profile_manager.h"
 #include "components/signin/core/common/profile_management_switches.h"
+#include "content/public/test/test_browser_thread_bundle.h"
 #include "testing/gtest_mac.h"
 #import "ui/base/cocoa/controls/hyperlink_button_cell.h"
 #include "ui/events/test/cocoa_test_event_utils.h"
 
 class AvatarMenuBubbleControllerTest : public CocoaTest {
  public:
   AvatarMenuBubbleControllerTest()
       : manager_(TestingBrowserProcess::GetGlobal()) {
   }
 
@@ skipping 30 matching lines @@
 
   AvatarMenuItemController* GetHighlightedItem() {
     for (AvatarMenuItemController* item in [controller() items]) {
       if ([item isHighlighted])
         return item;
     }
     return nil;
   }
 
  private:
+  content::TestBrowserThreadBundle thread_bundle_;
   TestingProfileManager manager_;
 
   // Weak; releases self.
   AvatarMenuBubbleController* controller_;
 
   // Weak; owned by |controller_|.
   AvatarMenu* menu_;
 };
 
 TEST_F(AvatarMenuBubbleControllerTest, InitialLayout) {
@@ skipping 186 matching lines @@
   [controller() keyDown:event];
   EXPECT_EQ([[controller() items] objectAtIndex:0], GetHighlightedItem());
 
   [controller() keyDown:event];
   EXPECT_EQ([[controller() items] objectAtIndex:1], GetHighlightedItem());
 
   // There are no more items now so going up should stay at the first item.
   [controller() keyDown:event];
   EXPECT_EQ([[controller() items] objectAtIndex:1], GetHighlightedItem());
 }