Center Keyboard Overlay in the work area

ash/content/keyboard_overlay/keyboard_overlay_delegate.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/content/keyboard_overlay/keyboard_overlay_delegate.h"
 
 #include <algorithm>
 
 #include "ash/shell.h"
 #include "base/bind.h"
@@ skipping 65 matching lines @@
   widget_->Init(params);
 
   // Show the widget at the bottom of the work area.
   gfx::Size size;
   GetDialogSize(&size);
   const gfx::Rect& rect =
       display::Screen::GetScreen()
           ->GetDisplayNearestWindow(widget_->GetNativeView())
           .work_area();
   gfx::Rect bounds(rect.x() + (rect.width() - size.width()) / 2,
-                   rect.bottom() - size.height(), size.width(), size.height());
+                   rect.y() + (rect.height() - size.height()) / 2, size.width(),
+                   size.height());
   widget_->SetBounds(bounds);
 
   // The widget will be shown when the web contents gets ready to display.
   return widget_;
 }
 
 ui::ModalType KeyboardOverlayDelegate::GetDialogModalType() const {
   return ui::MODAL_TYPE_SYSTEM;
 }
 
@@ skipping 36 matching lines @@
 bool KeyboardOverlayDelegate::ShouldShowDialogTitle() const {
   return false;
 }
 
 bool KeyboardOverlayDelegate::HandleContextMenu(
     const content::ContextMenuParams& params) {
   return true;
 }
 
 }  // namespace ash