Use GridLayout for DialogClientView's button row.

ui/views/examples/dialog_example.cc

 // Copyright 2017 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/examples/dialog_example.h"
 
 #include "base/macros.h"
 #include "base/strings/utf_string_conversions.h"
 #include "ui/views/bubble/bubble_dialog_delegate.h"
 #include "ui/views/controls/button/checkbox.h"
@@ skipping 227 matching lines @@
 
 void DialogExample::ResizeDialog() {
   DCHECK(last_dialog_);
   Widget* widget = last_dialog_->GetWidget();
   gfx::Rect preferred_bounds(widget->GetRestoredBounds());
   preferred_bounds.set_size(widget->non_client_view()->GetPreferredSize());
 
   // Q: Do we need NonClientFrameView::GetWindowBoundsForClientBounds() here?
   // A: When DialogCientView properly feeds back sizes, we do not.
   widget->SetBoundsConstrained(preferred_bounds);
+
+  // For user-resizable dialogs, ensure the window manager enforces any new
+  // minimum size.
+  widget->OnSizeConstraintsChanged();
 }
 
 void DialogExample::ButtonPressed(Button* sender, const ui::Event& event) {
   if (sender == show_) {
     if (bubble_->checked()) {
       Bubble* bubble = new Bubble(this, sender);
       last_dialog_ = bubble;
       BubbleDialogDelegateView::CreateBubble(bubble);
     } else {
       Dialog* dialog = new Dialog(this);
@@ skipping 62 matching lines @@
 #endif
   show_->SetEnabled(enable);
   if (!enable && GetModalType() == ui::MODAL_TYPE_CHILD)
     PrintStatus("MODAL_TYPE_CHILD can't be used with non-bubbles.");
   if (!enable && GetModalType() == ui::MODAL_TYPE_SYSTEM)
     PrintStatus("MODAL_TYPE_SYSTEM isn't supported on Mac.");
 }
 
 }  // namespace examples
 }  // namespace views