Print Preview: Make print preview tab modal.

chrome/browser/ui/webui/web_ui_browsertest.cc

Index: chrome/browser/ui/webui/web_ui_browsertest.cc
===================================================================
--- chrome/browser/ui/webui/web_ui_browsertest.cc	(revision 105366)
+++ chrome/browser/ui/webui/web_ui_browsertest.cc	(working copy)
@@ -12,6 +12,7 @@
 #include "base/path_service.h"
 #include "base/utf_string_conversions.h"
 #include "base/values.h"
+#include "chrome/browser/printing/print_preview_tab_controller.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_navigator.h"
 #include "chrome/browser/ui/webui/chrome_web_ui.h"
@@ -206,6 +207,13 @@
       browser()->tabstrip_model(), this);
   browser()->Print();
   tabstrip_observer.WaitForObservation();
+  printing::PrintPreviewTabController* tab_controller =
+      printing::PrintPreviewTabController::GetInstance();
+  ASSERT_TRUE(tab_controller);
+  TabContentsWrapper* preview_tab = tab_controller->GetPrintPreviewForTab(
+      browser()->GetSelectedTabContentsWrapper());
+  ASSERT_TRUE(preview_tab);
+  SetWebUIInstance(preview_tab->web_ui());
 }
 
 const char WebUIBrowserTest::kDummyURL[] = "chrome://DummyURL";