Fix handling of minimized panel count

chrome/browser/ui/panels/panel.cc

 // Copyright (c) 2012 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.h"
 
 #include "base/logging.h"
 #include "chrome/browser/extensions/extension_prefs.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/profiles/profile.h"
@@ skipping 34 matching lines @@
 
 Panel::Panel(Browser* browser, const gfx::Size& requested_size)
     : browser_(browser),
       panel_strip_(NULL),
       initialized_(false),
       has_temporary_layout_(false),
       restored_size_(requested_size),
       auto_resizable_(false),
       always_on_top_(false),
       in_preview_mode_(false),
-      expansion_state_(EXPANDED),
-      old_expansion_state_(EXPANDED) {
+      expansion_state_(EXPANDED) {
 }
 
 Panel::~Panel() {
   // Invoked by native panel destructor. Do not access native_panel_ here.
 }
 
 void Panel::Initialize(const gfx::Rect& bounds) {
   DCHECK(!initialized_);
   DCHECK(!bounds.IsEmpty());
   initialized_ = true;
@@ skipping 104 matching lines @@
 
 void  Panel::SetPanelStrip(PanelStrip* new_strip) {
   panel_strip_ = new_strip;
   if (panel_strip_ != NULL && initialized_)
     native_panel_->PreventActivationByOS(panel_strip_->IsPanelMinimized(this));
 }
 
 void Panel::SetExpansionState(ExpansionState new_state) {
   if (expansion_state_ == new_state)
     return;
-  old_expansion_state_ = expansion_state_;
   expansion_state_ = new_state;
 
   manager()->OnPanelExpansionStateChanged(this);
 
   // The minimized panel should not get the focus.
   if (expansion_state_ == MINIMIZED)
     Deactivate();
 
   DCHECK(initialized_ && panel_strip_ != NULL);
   native_panel_->PreventActivationByOS(panel_strip_->IsPanelMinimized(this));
@@ skipping 511 matching lines @@
       native_panel_->ContentSizeFromWindowSize(max_size_));
 }
 
 void Panel::OnWindowSizeAvailable() {
   ConfigureAutoResize(browser()->GetSelectedWebContents());
 }
 
 void Panel::DestroyBrowser() {
   native_panel_->DestroyPanelBrowser();
 }