Print Preview: Use the global PrintPreviewTabController in unit tests.

chrome/browser/ui/webui/print_preview_ui_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 <vector>
 
 #include "base/command_line.h"
 #include "base/memory/ref_counted_memory.h"
 #include "chrome/browser/printing/print_preview_tab_controller.h"
 #include "chrome/browser/ui/browser_list.h"
@@ skipping 32 matching lines @@
   ASSERT_TRUE(browser());
   BrowserList::SetLastActive(browser());
   ASSERT_TRUE(BrowserList::GetLastActive());
 
   browser()->NewTab();
   TabContentsWrapper* initiator_tab =
       browser()->GetSelectedTabContentsWrapper();
   ASSERT_TRUE(initiator_tab);
   EXPECT_EQ(0U, GetConstrainedWindowCount(initiator_tab));
 
-  scoped_refptr<printing::PrintPreviewTabController>
-      controller(new printing::PrintPreviewTabController());
+  printing::PrintPreviewTabController* controller =
+      printing::PrintPreviewTabController::GetInstance();
   ASSERT_TRUE(controller);
 
   TabContentsWrapper* preview_tab =
       controller->GetOrCreatePreviewTab(initiator_tab);
 
   EXPECT_NE(initiator_tab, preview_tab);
   EXPECT_EQ(1, browser()->tab_count());
   EXPECT_EQ(1U, GetConstrainedWindowCount(initiator_tab));
 
   PrintPreviewUI* preview_ui =
@@ skipping 167 matching lines @@
   cancel = false;
   preview_ui->GetCurrentPrintPreviewStatus(preview_ui_addr, kFirstRequestId,
                                            &cancel);
   EXPECT_TRUE(cancel);
 
   cancel = true;
   preview_ui->GetCurrentPrintPreviewStatus(preview_ui_addr, kSecondRequestId,
                                            &cancel);
   EXPECT_FALSE(cancel);
 }