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

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

 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "chrome/browser/ui/cocoa/tabs/tab_strip_controller.h"
 
 #import <QuartzCore/QuartzCore.h>
 
 #include <limits>
 #include <string>
@@ skipping 453 matching lines @@
     // sidebar and tab content from resizing sidebar's content view.
     // ensureContentsVisible (see below) sets content size and autoresizing
     // properties.
     [newView setFrame:[oldView frame]];
     [switchView_ replaceSubview:oldView with:newView];
   } else {
     [newView setFrame:[switchView_ bounds]];
     [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();
     NSWindowController* controller = [[newView window] windowController];
     DCHECK([controller isKindOfClass:[BrowserWindowController class]]);
 
     for (it = newTab->tab_contents()->constrained_window_begin();
          it != end;
          ++it) {
       ConstrainedWindow* constrainedWindow = *it;
@@ skipping 1400 matching lines @@
   NSInteger index = [self indexFromModelIndex:modelIndex];
   BrowserWindowController* controller =
       (BrowserWindowController*)[[switchView_ window] windowController];
   DCHECK(index >= 0);
   if (index >= 0) {
     [controller setTab:[self viewAtIndex:index] isDraggable:YES];
   }
 }
 
 @end