cocoa/bookmarks: Do not rely on Browser::tabstrip_model() accessor.

chrome/browser/ui/cocoa/bookmarks/bookmark_all_tabs_controller.mm

Index: chrome/browser/ui/cocoa/bookmarks/bookmark_all_tabs_controller.mm
diff --git a/chrome/browser/ui/cocoa/bookmarks/bookmark_all_tabs_controller.mm b/chrome/browser/ui/cocoa/bookmarks/bookmark_all_tabs_controller.mm
index 82a4765fb7473f94a0e749eaef277ca39dc3b385..2de8c1b8212101170d284b8e5810630751411a12 100644
--- a/chrome/browser/ui/cocoa/bookmarks/bookmark_all_tabs_controller.mm
+++ b/chrome/browser/ui/cocoa/bookmarks/bookmark_all_tabs_controller.mm
@@ -44,13 +44,10 @@ using content::WebContents;
 - (void)UpdateActiveTabPairs {
   activeTabPairsVector_.clear();
   Browser* browser = BrowserList::GetLastActive();
-  TabStripModel* tabstrip_model = browser->tabstrip_model();
-  const int tabCount = tabstrip_model->count();
+  const int tabCount = browser->tab_count();
   for (int i = 0; i < tabCount; ++i) {
-    WebContents* wc = tabstrip_model->GetTabContentsAt(i)->web_contents();
-    const string16 tabTitle = wc->GetTitle();
-    const GURL& tabURL(wc->GetURL());
-    ActiveTabNameURLPair tabPair(tabTitle, tabURL);
+    WebContents* contents = browser->GetWebContentsAt(i);
+    ActiveTabNameURLPair tabPair(contents->GetTitle(), contents->GetURL());
     activeTabPairsVector_.push_back(tabPair);
   }
 }