Makes the launcher auto-hide for maximized windows. This turned out to

ash/shell.h

 // 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.
 
 #ifndef ASH_SHELL_H_
 #define ASH_SHELL_H_
 #pragma once
 
 #include <utility>
 #include <vector>
@@ skipping 133 matching lines @@
   // Creates a default views::NonClientFrameView for use by windows in the
   // Ash environment.
   views::NonClientFrameView* CreateDefaultNonClientFrameView(
       views::Widget* widget);
 
   // Rotate focus through containers that can receive focus.
   void RotateFocus(Direction direction);
 
   // Sets the work area insets of the monitor that contains |window|,
   // this notifies observers too.
+  // TODO(sky): this no longer really replicates what happens and is unreliable.
+  // Remove this.
   void SetMonitorWorkAreaInsets(aura::Window* window,
                                 const gfx::Insets& insets);
 
   // Add/remove observer.
   void AddShellObserver(ShellObserver* observer);
   void RemoveShellObserver(ShellObserver* observer);
 
 #if !defined(OS_MACOSX)
   AcceleratorController* accelerator_controller() {
     return accelerator_controller_.get();
@@ skipping 139 matching lines @@
   // System tray with clock, Wi-Fi signal, etc. (a replacement in progress for
   // |status_widget_|).
   scoped_ptr<SystemTray> tray_;
 
   DISALLOW_COPY_AND_ASSIGN(Shell);
 };
 
 }  // namespace ash
 
 #endif  // ASH_SHELL_H_