[mac] Remember last used prefs tab.

chrome/browser/cocoa/preferences_window_controller.h

 // Copyright (c) 2009 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 <Cocoa/Cocoa.h>
 
 #include "base/scoped_ptr.h"
 #include "base/scoped_nsobject.h"
 #include "chrome/common/pref_member.h"
 
@@ skipping 20 matching lines @@
   Profile* profile_;  // weak ref
   PrefService* prefs_;  // weak ref - Obtained from profile_ for convenience.
   scoped_ptr<PrefObserverBridge> observer_;  // Watches for pref changes.
 
   IBOutlet NSToolbar* toolbar_;
 
   // The views we'll rotate through
   IBOutlet NSView* basicsView_;
   IBOutlet NSView* personalStuffView_;
   IBOutlet NSView* underTheHoodView_;
+  // The last page the user was on when they opened the Options window.
+  IntegerPrefMember lastSelectedPage_;
 
   // Having two animations around is bad (they fight), so just use one.
   scoped_nsobject<NSViewAnimation> animation_;
 
   IBOutlet NSArrayController* customPagesArrayController_;
 
   // Basics panel
   IntegerPrefMember restoreOnStartup_;
   scoped_nsobject<CustomHomePagesModel> customPagesSource_;
   BooleanPrefMember newTabPageIsHomePage_;
@@ skipping 52 matching lines @@
 // When a toolbar button is clicked
 - (IBAction)toolbarButtonSelected:(id)sender;
 
 // Usable from cocoa bindings to hook up the custom home pages table.
 @property(readonly) CustomHomePagesModel* customPagesSource;
 
 // NSNotification sent when the prefs window is closed.
 extern NSString* const kUserDoneEditingPrefsNotification;
 
 @end