[WIN]Save work area of window and adjust bounds to ensure it fit on screen before show.

chrome/browser/ui/gtk/extensions/native_app_window_gtk.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/gtk/extensions/native_app_window_gtk.h"
 
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/gtk/extensions/extension_keybinding_registry_gtk.h"
 #include "chrome/browser/ui/gtk/gtk_util.h"
@@ skipping 275 matching lines @@
 
   int left_inset = current_x - rect_with_decorations.x;
   int top_inset = current_y - rect_with_decorations.y;
   return gfx::Insets(
       top_inset,
       left_inset,
       rect_with_decorations.height - current_height - top_inset,
       rect_with_decorations.width - current_width - left_inset);
 }
 
+gfx::Rect NativeAppWindowGtk::GetWindowWorkArea() const {
+  NOTIMPLEMENTED();
+  return gfx::Rect();
+}
+
 gfx::NativeView NativeAppWindowGtk::GetHostView() const {
   NOTIMPLEMENTED();
   return NULL;
 }
 
 gfx::Point NativeAppWindowGtk::GetDialogPosition(const gfx::Size& size) {
   gint current_width = 0;
   gint current_height = 0;
   gtk_window_get_size(window_, &current_width, &current_height);
   return gfx::Point(current_width / 2 - size.width() / 2,
@@ skipping 223 matching lines @@
 
   draggable_region_.reset(ShellWindow::RawDraggableRegionsToSkRegion(regions));
 }
 
 // static
 NativeAppWindow* NativeAppWindow::Create(
     ShellWindow* shell_window,
     const ShellWindow::CreateParams& params) {
   return new NativeAppWindowGtk(shell_window, params);
 }