views: don't snap dialogs with no buttons

ui/views/bubble/bubble_dialog_delegate.h

Index: ui/views/bubble/bubble_dialog_delegate.h
diff --git a/ui/views/bubble/bubble_dialog_delegate.h b/ui/views/bubble/bubble_dialog_delegate.h
index ac934267eb2e7eca8feec531e3ff84889273f1a7..eb33117fe62c351de00dddd69d6e1376c184d9cb 100644
--- a/ui/views/bubble/bubble_dialog_delegate.h
+++ b/ui/views/bubble/bubble_dialog_delegate.h
@@ -39,6 +39,9 @@ class VIEWS_EXPORT BubbleDialogDelegateView : public DialogDelegateView,
   // Create and initialize the bubble Widget(s) with proper bounds.
   static Widget* CreateBubble(BubbleDialogDelegateView* bubble_delegate);
 
+  // DialogDelegateView overrides:
+  bool ShouldSnapFrameWidth() const override;
+
   // WidgetDelegateView overrides:
   BubbleDialogDelegateView* AsBubbleDialogDelegate() override;
   bool ShouldShowCloseButton() const override;