Print Preview: Use the global PrintPreviewTabController in unit tests.

chrome/browser/printing/print_preview_tab_controller_unittest.cc

Index: chrome/browser/printing/print_preview_tab_controller_unittest.cc
===================================================================
--- chrome/browser/printing/print_preview_tab_controller_unittest.cc	(revision 110639)
+++ chrome/browser/printing/print_preview_tab_controller_unittest.cc	(working copy)
@@ -41,8 +41,8 @@
   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.
@@ -93,8 +93,8 @@
   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|
@@ -153,8 +153,8 @@
   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.