Remove TabContents from AddBlankTabAt, kill AddBlankTab.

chrome/browser/sessions/session_restore_browsertest.cc

Index: chrome/browser/sessions/session_restore_browsertest.cc
diff --git a/chrome/browser/sessions/session_restore_browsertest.cc b/chrome/browser/sessions/session_restore_browsertest.cc
index a55c778234b5d2ecdce8cc57b15a1430966ab19a..3299845c3b532ca82b6b9852d455c00cd868dd65 100644
--- a/chrome/browser/sessions/session_restore_browsertest.cc
+++ b/chrome/browser/sessions/session_restore_browsertest.cc
@@ -181,7 +181,7 @@ IN_PROC_BROWSER_TEST_F(SessionRestoreTest, NoSessionRestoreNewWindowChromeOS) {
   ui_test_utils::NavigateToURL(browser(), url);
 
   Browser* incognito_browser = CreateIncognitoBrowser();
-  chrome::AddBlankTab(incognito_browser, true);
+  chrome::AddBlankTabAt(incognito_browser, -1, true);
   incognito_browser->window()->Show();
 
   // Close the normal browser. After this we only have the incognito window
@@ -374,7 +374,7 @@ IN_PROC_BROWSER_TEST_F(SessionRestoreTest, IncognitotoNonIncognito) {
 
   // Create a new incognito window.
   Browser* incognito_browser = CreateIncognitoBrowser();
-  chrome::AddBlankTab(incognito_browser, true);
+  chrome::AddBlankTabAt(incognito_browser, -1, true);
   incognito_browser->window()->Show();
 
   // Close the normal browser. After this we only have the incognito window