views: support dialog width snapping once and for all

ui/views/layout/layout_provider.cc

Index: ui/views/layout/layout_provider.cc
diff --git a/ui/views/layout/layout_provider.cc b/ui/views/layout/layout_provider.cc
index 208b9aa7012a0420e4e5f3f6a8307eceac592f4b..3cb034c5463d1e2b45a3d9aa931c88389c55519d 100644
--- a/ui/views/layout/layout_provider.cc
+++ b/ui/views/layout/layout_provider.cc
@@ -77,4 +77,8 @@ const TypographyProvider& LayoutProvider::GetTypographyProvider() const {
   return typography_provider_;
 }
 
-}  // namespace views
+int LayoutProvider::GetSnappedDialogWidth(int min_width) const {
+  return min_width;
+}
+
+}  // namespace views