Place browser-modal dialogs like web-contents-modal dialogs.

chrome/browser/ui/views/javascript_app_modal_dialog_views.cc

Index: chrome/browser/ui/views/javascript_app_modal_dialog_views.cc
diff --git a/chrome/browser/ui/views/javascript_app_modal_dialog_views.cc b/chrome/browser/ui/views/javascript_app_modal_dialog_views.cc
index fb89b4cd5221c09eae913b2750ee0cda7675c7b6..d4981e36735d2c2c637c9ea2c8f42950da55ec4c 100644
--- a/chrome/browser/ui/views/javascript_app_modal_dialog_views.cc
+++ b/chrome/browser/ui/views/javascript_app_modal_dialog_views.cc
@@ -6,6 +6,7 @@
 
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/ui/app_modal_dialogs/javascript_app_modal_dialog.h"
+#include "chrome/browser/ui/views/constrained_window_views.h"
 #include "grit/generated_resources.h"
 #include "ui/base/keycodes/keyboard_codes.h"
 #include "ui/base/l10n/l10n_util.h"
@@ -162,16 +163,6 @@ NativeAppModalDialog* NativeAppModalDialog::CreateNativeJavaScriptPrompt(
     JavaScriptAppModalDialog* dialog,
     gfx::NativeWindow parent_window) {
   JavaScriptAppModalDialogViews* d = new JavaScriptAppModalDialogViews(dialog);
-  views::Widget* widget =
-      views::DialogDelegate::CreateDialogWidget(d, NULL, parent_window);
-  views::Widget* parent_widget = parent_window ?
-      views::Widget::GetWidgetForNativeWindow(parent_window) : NULL;
-  // Horizontally center the dialog window within the parent window's bounds.
-  if (widget && parent_widget) {
-    gfx::Rect bounds(widget->GetWindowBoundsInScreen());
-    gfx::Rect parent_bounds(parent_widget->GetWindowBoundsInScreen());
-    bounds.set_x(parent_bounds.CenterPoint().x() - bounds.width() / 2);
-    widget->SetBounds(bounds);
-  }
+  CreateBrowserModalDialogViews(d, parent_window);
   return d;
 }