Sidebar mini tabs UI (views version)....

chrome/browser/ui/cocoa/tabs/tab_strip_controller.mm

Index: chrome/browser/ui/cocoa/tabs/tab_strip_controller.mm
===================================================================
--- chrome/browser/ui/cocoa/tabs/tab_strip_controller.mm	(revision 74134)
+++ chrome/browser/ui/cocoa/tabs/tab_strip_controller.mm	(working copy)
@@ -471,16 +471,17 @@
     [switchView_ addSubview:newView];
   }
 
+  TabContentsWrapper* newTab = tabStripModel_->GetTabContentsAt(modelIndex);
+  DCHECK(newTab);
+
   // New content is in place, delegate should adjust itself accordingly.
-  [delegate_ onSelectTabWithContents:[controller tabContents]];
+  [delegate_ onSelectTab:newTab];
 
   // It also restores content autoresizing properties.
   [controller ensureContentsVisible];
 
   // Make sure the new tabs's sheets are visible (necessary when a background
   // tab opened a sheet while it was in the background and now becomes active).
-  TabContentsWrapper* newTab = tabStripModel_->GetTabContentsAt(modelIndex);
-  DCHECK(newTab);
   if (newTab) {
     TabContents::ConstrainedWindowList::iterator it, end;
     end = newTab->tab_contents()->constrained_window_end();