Fix Linux panels to return to minimized mode after mouse moves away.

chrome/browser/ui/panels/docked_panel_strip.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/docked_panel_strip.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "base/auto_reset.h"
@@ skipping 567 matching lines @@
 
     gfx::Rect bounds = panel->GetBounds();
     if (bounds.x() <= mouse_x && mouse_x <= bounds.right() &&
         mouse_y >= bounds.y())
       return true;
   }
   return false;
 }
 
 void DockedPanelStrip::BringUpOrDownTitlebars(bool bring_up) {
+  if (are_titlebars_up_ == bring_up)
+    return;
+
   are_titlebars_up_ = bring_up;
   int task_delay_ms = 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.
   DisplaySettingsProvider* provider =
       panel_manager_->display_settings_provider();
   if (provider->IsAutoHidingDesktopBarEnabled(
           DisplaySettingsProvider::DESKTOP_BAR_ALIGNED_BOTTOM)) {
@@ skipping 259 matching lines @@
 void DockedPanelStrip::OnPanelActiveStateChanged(Panel* panel) {
   // Refresh layout, but wait till active states settle.
   // This lets us avoid refreshing too many times when one panel loses
   // focus and another gains it.
   ScheduleLayoutRefresh();
 }
 
 bool DockedPanelStrip::HasPanel(Panel* panel) const {
   return find(panels_.begin(), panels_.end(), panel) != panels_.end();
 }