Keep panel manager internal titlebar state consistent with changes to titlebars.

chrome/browser/ui/panels/panel_manager.cc

 // 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_manager.h"
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "base/logging.h"
@@ skipping 402 matching lines @@
 
   for (Panels::const_iterator iter = panels_.begin();
        iter != panels_.end(); ++iter) {
     if ((*iter)->ShouldBringUpTitlebar(mouse_x, mouse_y))
       return true;
   }
   return false;
 }
 
 void PanelManager::BringUpOrDownTitlebars(bool bring_up) {
+  if (are_titlebars_up_ == bring_up)
+    return;
+  are_titlebars_up_ = bring_up;
+
   int task_delay_milliseconds = 0;
 
   // If the auto-hiding bottom bar exists, delay the action until the bottom
   // bar is fully visible or hidden. We do not want both bottom bar and panel
   // titlebar to move at the same time but with different speeds.
   if (auto_hiding_desktop_bar_->IsEnabled(AutoHidingDesktopBar::ALIGN_BOTTOM)) {
     AutoHidingDesktopBar::Visibility visibility = auto_hiding_desktop_bar_->
         GetVisibility(AutoHidingDesktopBar::ALIGN_BOTTOM);
     if (visibility != (bring_up ? AutoHidingDesktopBar::VISIBLE
                                 : AutoHidingDesktopBar::HIDDEN)) {
@@ skipping 117 matching lines @@
     if (panel->browser() != browser && !browser->window()->IsMinimized())
       return browser->window();
   }
 
   return NULL;
 }
 
 void PanelManager::OnMouseMove(const gfx::Point& mouse_position) {
   bool bring_up_titlebars = ShouldBringUpTitlebars(mouse_position.x(),
                                                    mouse_position.y());
-  if (are_titlebars_up_ == bring_up_titlebars)
-    return;
-  are_titlebars_up_ = bring_up_titlebars;
   BringUpOrDownTitlebars(bring_up_titlebars);
 }
 
 void PanelManager::OnAutoHidingDesktopBarThicknessChanged() {
   AdjustWorkAreaForAutoHidingDesktopBars();
   Rearrange(panels_.begin(), StartingRightPosition());
 }
 
 void PanelManager::OnAutoHidingDesktopBarVisibilityChanged(
     AutoHidingDesktopBar::Alignment alignment,
@@ skipping 35 matching lines @@
   // Start from the bottom to avoid reshuffling.
   for (Panels::reverse_iterator iter = panels_copy.rbegin();
        iter != panels_copy.rend(); ++iter)
     (*iter)->Close();
 }
 
 bool PanelManager::is_dragging_panel() const {
   return dragging_panel_index_ != kInvalidPanelIndex;
 }