Print Preview: Use the global PrintPreviewTabController in unit tests.

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/tab_contents/tab_contents_wrapper.h"
 #include "chrome/browser/ui/webui/print_preview_ui.h"
 #include "chrome/test/base/browser_with_test_window_test.h"
@@ skipping 23 matching lines @@
   // Lets start with one window with one tab.
   EXPECT_EQ(1u, BrowserList::size());
   EXPECT_EQ(0, browser()->tab_count());
   browser()->NewTab();
   EXPECT_EQ(1, browser()->tab_count());
 
   // Create a reference to initiator tab contents.
   TabContentsWrapper* initiator_tab =
       browser()->GetSelectedTabContentsWrapper();
 
-  scoped_refptr<printing::PrintPreviewTabController>
-      tab_controller(new printing::PrintPreviewTabController());
+  printing::PrintPreviewTabController* tab_controller =
+      printing::PrintPreviewTabController::GetInstance();
   ASSERT_TRUE(tab_controller);
 
   // Get the preview tab for initiator tab.
   TabContentsWrapper* preview_tab =
       tab_controller->GetOrCreatePreviewTab(initiator_tab);
 
   // New print preview tab is created.
   EXPECT_EQ(1, browser()->tab_count());
   EXPECT_NE(initiator_tab, preview_tab);
 
@@ skipping 30 matching lines @@
   TabContentsWrapper* tab_contents_1 =
       browser()->GetSelectedTabContentsWrapper();
   ASSERT_TRUE(tab_contents_1);
 
   browser()->NewTab();
   TabContentsWrapper* tab_contents_2 =
       browser()->GetSelectedTabContentsWrapper();
   ASSERT_TRUE(tab_contents_2);
   EXPECT_EQ(2, browser()->tab_count());
 
-  scoped_refptr<printing::PrintPreviewTabController>
-      tab_controller(new printing::PrintPreviewTabController());
+  printing::PrintPreviewTabController* tab_controller =
+      printing::PrintPreviewTabController::GetInstance();
   ASSERT_TRUE(tab_controller);
 
   // Create preview tab for |tab_contents_1|
   TabContentsWrapper* preview_tab_1 =
       tab_controller->GetOrCreatePreviewTab(tab_contents_1);
 
   EXPECT_NE(tab_contents_1, preview_tab_1);
   EXPECT_EQ(2, browser()->tab_count());
 
   // Create preview tab for |tab_contents_2|
@@ skipping 38 matching lines @@
   // Lets start with one window with one tab.
   EXPECT_EQ(1u, BrowserList::size());
   EXPECT_EQ(0, browser()->tab_count());
   browser()->NewTab();
   EXPECT_EQ(1, browser()->tab_count());
 
   // Create a reference to initiator tab contents.
   TabContentsWrapper* initiator_tab =
       browser()->GetSelectedTabContentsWrapper();
 
-  scoped_refptr<printing::PrintPreviewTabController>
-      tab_controller(new printing::PrintPreviewTabController());
+  printing::PrintPreviewTabController* tab_controller =
+      printing::PrintPreviewTabController::GetInstance();
   ASSERT_TRUE(tab_controller);
 
   // Get the preview tab for initiator tab.
   TabContentsWrapper* preview_tab =
       tab_controller->GetOrCreatePreviewTab(initiator_tab);
 
   // New print preview tab is created. Current focus is on preview tab.
   EXPECT_EQ(1, browser()->tab_count());
   EXPECT_NE(initiator_tab, preview_tab);
 
   // Clear the initiator tab details associated with the preview tab.
   tab_controller->EraseInitiatorTabInfo(preview_tab);
 
   // Get the print preview tab for initiator tab.
   TabContentsWrapper* new_preview_tab =
       tab_controller->GetOrCreatePreviewTab(initiator_tab);
 
   // New preview tab is created.
   EXPECT_EQ(1, browser()->tab_count());
   EXPECT_NE(new_preview_tab, preview_tab);
 }