views: don't snap dialogs with no buttons

ui/views/bubble/bubble_frame_view_unittest.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 "ui/views/bubble/bubble_frame_view.h"
 
 #include <memory>
 
 #include "base/macros.h"
 #include "build/build_config.h"
@@ skipping 492 matching lines @@
 
   using BubbleDialogDelegateView::SetAnchorView;
 
   void set_override_snap(bool value) { override_snap_ = value; }
 
   // BubbleDialogDelegateView:
   void DeleteDelegate() override {
     // This delegate is owned by the test case itself, so it should not delete
     // itself here.
   }
-  int GetDialogButtons() const override { return ui::DIALOG_BUTTON_NONE; }
+  int GetDialogButtons() const override { return ui::DIALOG_BUTTON_OK; }
   bool ShouldSnapFrameWidth() const override {
     return override_snap_.value_or(
         BubbleDialogDelegateView::ShouldSnapFrameWidth());
   }
   gfx::Size GetPreferredSize() const override { return gfx::Size(200, 200); }
 
  private:
   base::Optional<bool> override_snap_;
 
   DISALLOW_COPY_AND_ASSIGN(TestBubbleDialogDelegateView);
@@ skipping 35 matching lines @@
   // If the DialogDelegate asks not to snap, it should not snap.
   delegate.set_override_snap(false);
   Widget* w2 = BubbleDialogDelegateView::CreateBubble(&delegate);
   w2->Show();
   EXPECT_EQ(delegate.GetPreferredSize().width(),
             w2->GetWindowBoundsInScreen().width());
   w2->CloseNow();
 }
 
 }  // namespace views