Fix handling of minimized panel count

chrome/browser/ui/panels/panel.cc

Index: chrome/browser/ui/panels/panel.cc
diff --git a/chrome/browser/ui/panels/panel.cc b/chrome/browser/ui/panels/panel.cc
index a2e60a33583cc4873f7aef89f77fa85b5900a538..c24465c866dbde4db7a5794dec0442c1fe525065 100644
--- a/chrome/browser/ui/panels/panel.cc
+++ b/chrome/browser/ui/panels/panel.cc
@@ -50,7 +50,6 @@ Panel::Panel(Browser* browser, const gfx::Size& requested_size)
       restored_size_(requested_size),
       auto_resizable_(false),
       expansion_state_(EXPANDED),
-      old_expansion_state_(EXPANDED),
       app_icon_visible_(true) {
 }
 
@@ -159,7 +158,6 @@ void Panel::SetAppIconVisibility(bool visible) {
 void Panel::SetExpansionState(ExpansionState new_state) {
   if (expansion_state_ == new_state)
     return;
-  old_expansion_state_ = expansion_state_;
   expansion_state_ = new_state;
 
   manager()->OnPanelExpansionStateChanged(this);