mash: Convert system tray logout button to wm common types

ui/views/window/dialog_delegate.cc

Index: ui/views/window/dialog_delegate.cc
diff --git a/ui/views/window/dialog_delegate.cc b/ui/views/window/dialog_delegate.cc
index d2271142430af71880215d6f500ba21a769db814..4b8a1f9890010f0a94e8d95083fee7e4f593a2ff 100644
--- a/ui/views/window/dialog_delegate.cc
+++ b/ui/views/window/dialog_delegate.cc
@@ -37,15 +37,19 @@ DialogDelegate::~DialogDelegate() {}
 Widget* DialogDelegate::CreateDialogWidget(WidgetDelegate* delegate,
                                            gfx::NativeWindow context,
                                            gfx::NativeView parent) {
-  return CreateDialogWidgetWithBounds(delegate, context, parent, gfx::Rect());
+  views::Widget* widget = new views::Widget;
+  views::Widget::InitParams params =
+      GetDialogWidgetInitParams(delegate, context, parent, gfx::Rect());
+  widget->Init(params);
+  return widget;
 }
 
 // static
-Widget* DialogDelegate::CreateDialogWidgetWithBounds(WidgetDelegate* delegate,
-                                                     gfx::NativeWindow context,
-                                                     gfx::NativeView parent,
-                                                     const gfx::Rect& bounds) {
-  views::Widget* widget = new views::Widget;
+Widget::InitParams DialogDelegate::GetDialogWidgetInitParams(
+    WidgetDelegate* delegate,
+    gfx::NativeWindow context,
+    gfx::NativeView parent,
+    const gfx::Rect& bounds) {
   views::Widget::InitParams params;
   params.delegate = delegate;
   params.bounds = bounds;
@@ -80,8 +84,7 @@ Widget* DialogDelegate::CreateDialogWidgetWithBounds(WidgetDelegate* delegate,
   // method behaviors.
   params.child = parent && (delegate->GetModalType() == ui::MODAL_TYPE_CHILD);
 #endif
-  widget->Init(params);
-  return widget;
+  return params;
 }
 
 View* DialogDelegate::CreateExtraView() {