Fix Panel to always detect when a tab is added.

chrome/browser/ui/panels/panel_browser_window_cocoa.mm

 // Copyright (c) 2011 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.
 
 #include "chrome/browser/ui/panels/panel_browser_window_cocoa.h"
 
 #include "base/logging.h"
 #include "chrome/browser/tabs/tab_strip_model.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_list.h"
@@ skipping 230 matching lines @@
 Browser* PanelBrowserWindowCocoa::GetPanelBrowser() const {
   return browser();
 }
 
 void PanelBrowserWindowCocoa::DestroyPanelBrowser() {
   [controller_ close];
 }
 
 void PanelBrowserWindowCocoa::DidCloseNativeWindow() {
   DCHECK(!isClosed());
-  panel_->manager()->Remove(panel_.get());
+  panel_->OnNativePanelClosed();
   controller_ = NULL;
 }
 
 gfx::Size PanelBrowserWindowCocoa::WindowSizeFromContentSize(
     const gfx::Size& content_size) const {
   NSWindow* window = [controller_ window];
   NSRect content = NSMakeRect(0, 0,
                               content_size.width(), content_size.height());
   NSRect frame = [window frameRectForContentRect:content];
   return gfx::Size(NSWidth(frame), NSHeight(frame));
@@ skipping 87 matching lines @@
   return false;
 }
 
 bool NativePanelTestingCocoa::IsWindowSizeKnown() const {
   return true;
 }
 
 bool NativePanelTestingCocoa::IsAnimatingBounds() const {
   return [native_panel_window_->controller_ isAnimatingBounds];
 }