Switch ChromeTestSuite to the same convention as ContentTestSuite:

chrome/browser/printing/print_preview_tab_controller_unittest.cc

 // Copyright (c) 2011 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/printing/print_preview_tab_controller.h"
 #include "chrome/browser/tabs/tab_strip_model.h"
 #include "chrome/browser/ui/browser_list.h"
 #include "chrome/browser/ui/webui/print_preview_ui.h"
 #include "chrome/test/base/browser_with_test_window_test.h"
 #include "chrome/test/base/testing_profile.h"
 #include "content/browser/tab_contents/navigation_entry.h"
 #include "content/browser/tab_contents/navigation_details.h"
 #include "content/browser/tab_contents/tab_contents.h"
+#include "content/common/notification_service.h"
 #include "content/common/url_constants.h"
 
 typedef BrowserWithTestWindowTest PrintPreviewTabControllerUnitTest;
 
 // Create/Get a preview tab for initiator tab.
 TEST_F(PrintPreviewTabControllerUnitTest, GetOrCreatePreviewTab) {
   ASSERT_TRUE(browser());
   BrowserList::SetLastActive(browser());
   ASSERT_TRUE(BrowserList::GetLastActive());
 
@@ skipping 164 matching lines @@
   tab_controller->EraseInitiatorTabInfo(preview_tab);
 
   // Get the print preview tab for initiator tab.
   TabContents* new_preview_tab =
       tab_controller->GetOrCreatePreviewTab(initiator_tab);
 
   // New preview tab is created.
   EXPECT_EQ(3, browser()->tab_count());
   EXPECT_NE(new_preview_tab, preview_tab);
 }