Handle resize corner layout entirely in the platform BrowserWindow*/BrowserView* code...

chrome/browser/cocoa/sidebar_controller.h

 // 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.
 
 #ifndef CHROME_BROWSER_COCOA_SIDEBAR_CONTROLLER_H_
 #define CHROME_BROWSER_COCOA_SIDEBAR_CONTROLLER_H_
 #pragma once
 
 #import <Foundation/Foundation.h>
 
 #include "base/scoped_nsobject.h"
+#import "chrome/browser/cocoa/tab_contents_controller.h"
 
 @class NSSplitView;
 @class NSView;
 
 class TabContents;
 
 // A class that handles updates of the sidebar view within a browser window.
 // It swaps in the relevant sidebar contents for a given TabContents or removes
 // the vew, if there's no sidebar contents to show.
 @interface SidebarController : NSObject {
  @private
   // A view hosting sidebar contents.
   scoped_nsobject<NSSplitView> splitView_;
 
-  // Currently displayed sidebar contents.
-  TabContents* sidebarContents_;  // weak.
+  // Manages currently displayed sidebar contents.
+  scoped_nsobject<TabContentsController> contentsController_;
 }
 
-- (id)init;
+- (id)initWithDelegate:(id<TabContentsControllerDelegate>)delegate;
 
 // This controller's view.
 - (NSSplitView*)view;
 
 // The compiler seems to have trouble handling a function named "view" that
 // returns an NSSplitView, so provide a differently-named method.
 - (NSSplitView*)splitView;
 
 // Depending on |contents|'s state, decides whether the sidebar
 // should be shown or hidden and adjusts its width (|delegate_| handles
 // the actual resize).
 - (void)updateSidebarForTabContents:(TabContents*)contents;
 
+// Call when the sidebar view is properly sized and the render widget host view
+// should be put into the view hierarchy.
+- (void)ensureContentsVisible;
+
 @end
 
 #endif  // CHROME_BROWSER_COCOA_SIDEBAR_CONTROLLER_H_