Make javascript dialogs into top-level windows.

ui/views/win/hwnd_util_aurawin.cc

 // Copyright (c) 2013 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 "ui/views/win/hwnd_util.h"
 
 #include "ui/aura/root_window.h"
 #include "ui/views/widget/widget.h"
 
 namespace views {
 
 HWND HWNDForView(View* view) {
   return view->GetWidget() ? HWNDForWidget(view->GetWidget()) : NULL;
 }
 
 HWND HWNDForWidget(Widget* widget) {
   return HWNDForNativeWindow(widget->GetNativeWindow());
 }
 
 HWND HWNDForNativeView(gfx::NativeView view) {
   return view && view->GetRootWindow() ?
       view->GetRootWindow()->GetAcceleratedWidget() : NULL;
 }
 
 HWND HWNDForNativeWindow(gfx::NativeWindow window) {
   return window && window->GetRootWindow() ?
       window->GetRootWindow()->GetAcceleratedWidget() : NULL;
 }
 
+gfx::Rect GetWindowBoundsForClientBounds(View* view,
+                                         const gfx::Rect& client_bounds) {
+  DCHECK(view);
+  aura::RootWindow* window =
+      view->GetWidget()->GetNativeWindow()->GetRootWindow();
+  if (window) {
+    HWND hwnd = window->GetAcceleratedWidget();
+    RECT rect = client_bounds.ToRECT();
+    DWORD style = ::GetWindowLong(hwnd, GWL_STYLE);
+    DWORD ex_style = ::GetWindowLong(hwnd, GWL_EXSTYLE);
+    AdjustWindowRectEx(&rect, style, FALSE, ex_style);
+    return gfx::Rect(rect);
+  }
+  return client_bounds;
 }
+
+}  // namespace views