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

ash/wm/workspace/frame_maximize_button.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 "ash/wm/workspace/frame_maximize_button.h"
 
+#include "ash/screen_ash.h"
 #include "ash/shell.h"
 #include "ash/wm/property_util.h"
 #include "ash/launcher/launcher.h"
 #include "ash/wm/workspace/phantom_window_controller.h"
 #include "ash/wm/workspace/snap_sizer.h"
 #include "grit/ui_resources.h"
 #include "ui/aura/event.h"
 #include "ui/aura/event_filter.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/gfx/image/image.h"
@@ skipping 255 matching lines @@
   return frame_->GetWidget()->IsMaximized() ? SNAP_NONE : SNAP_MAXIMIZE;
 }
 
 gfx::Rect FrameMaximizeButton::BoundsForType(SnapType type) const {
   aura::Window* window = frame_->GetWidget()->GetNativeWindow();
   switch (type) {
     case SNAP_LEFT:
     case SNAP_RIGHT:
       return snap_sizer_->target_bounds();
     case SNAP_MAXIMIZE:
-      return gfx::Screen::GetMonitorWorkAreaNearestWindow(window);
+      return ScreenAsh::GetMaximizedWindowBounds(window);
     case SNAP_MINIMIZE: {
       Launcher* launcher = Shell::GetInstance()->launcher();
       gfx::Rect item_rect(launcher->GetScreenBoundsOfItemIconForWindow(window));
       if (!item_rect.IsEmpty()) {
         // PhantomWindowController insets slightly, outset it so the phantom
         // doesn't appear inset.
         item_rect.Inset(-8, -8);
         return item_rect;
       }
       return launcher->widget()->GetWindowScreenBounds();
@@ skipping 28 matching lines @@
       break;
     case SNAP_MINIMIZE:
       frame_->GetWidget()->Minimize();
       break;
     default:
       NOTREACHED();
   }
 }
 
 }  // namespace ash