Make <selectmenu> use flex-inline instead of line-block

BUG=1466889

Change-Id: I1fb6b716e3b43596b15460382376b7a1ad5e1b6d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4712749
Reviewed-by: Joey Arhar <jarhar@chromium.org>
Commit-Queue: Peter Kotwicz <pkotwicz@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1174876}
diff --git a/html/semantics/forms/the-selectmenu-element/selectmenu-option-arbitrary-content-displayed-ref.tentative.html b/html/semantics/forms/the-selectmenu-element/selectmenu-option-arbitrary-content-displayed-ref.tentative.html
index 171829d..c890bb6 100644
--- a/html/semantics/forms/the-selectmenu-element/selectmenu-option-arbitrary-content-displayed-ref.tentative.html
+++ b/html/semantics/forms/the-selectmenu-element/selectmenu-option-arbitrary-content-displayed-ref.tentative.html
@@ -27,7 +27,7 @@
     height: fit-content;
     background: -internal-light-dark(white, black);
     color: -internal-light-dark(black, white);
-    border: 1px solid rgba(0, 0, 0, 0.15);
+    border: 1px solid rgba(0, 0, 0, 1);
     border-radius: 0px;
     box-shadow: 0px 12.8px 28.8px rgba(0, 0, 0, 0.13), 0px 0px 9.2px rgba(0, 0, 0, 0.11);
     box-sizing: border-box;
diff --git a/html/semantics/forms/the-selectmenu-element/selectmenu-option-arbitrary-content-displayed.tentative.html b/html/semantics/forms/the-selectmenu-element/selectmenu-option-arbitrary-content-displayed.tentative.html
index 05bc651..416f2dc 100644
--- a/html/semantics/forms/the-selectmenu-element/selectmenu-option-arbitrary-content-displayed.tentative.html
+++ b/html/semantics/forms/the-selectmenu-element/selectmenu-option-arbitrary-content-displayed.tentative.html
@@ -24,7 +24,7 @@
     height: fit-content;
     background: white;
     color: black;
-    border: 1px solid rgba(0, 0, 0, 0.15);
+    border: 1px solid rgba(0, 0, 0, 1);
     border-radius: 0px;
     box-shadow: 0px 12.8px 28.8px rgba(0, 0, 0, 0.13), 0px 0px 9.2px rgba(0, 0, 0, 0.11);
     box-sizing: border-box;