Add UMA metric to track usage of sending a mousedown to select elements.

third_party/WebKit/LayoutTests/imported/wpt/html/semantics/grouping-content/the-ol-element/grouping-ol-type-reftest-002-expected.html

Index: third_party/WebKit/LayoutTests/imported/wpt/html/semantics/grouping-content/the-ol-element/grouping-ol-type-reftest-002-expected.html
diff --git a/third_party/WebKit/LayoutTests/imported/wpt/html/semantics/grouping-content/the-ol-element/grouping-ol-type-reftest-002-expected.html b/third_party/WebKit/LayoutTests/imported/wpt/html/semantics/grouping-content/the-ol-element/grouping-ol-type-reftest-002-expected.html
index b2c05468c624ae2a2f6ea89638b345ca60499824..cf31b7a9c2e15cabce31114df921a624aabfd6b8 100644
--- a/third_party/WebKit/LayoutTests/imported/wpt/html/semantics/grouping-content/the-ol-element/grouping-ol-type-reftest-002-expected.html
+++ b/third_party/WebKit/LayoutTests/imported/wpt/html/semantics/grouping-content/the-ol-element/grouping-ol-type-reftest-002-expected.html
@@ -5,7 +5,6 @@
     <title>ol element</title>
     <link rel="author" title="dzenana" href="mailto:dzenana.trenutak@gmail.com">
     <link rel="help" href="https://html.spec.whatwg.org/multipage/#the-ol-element">
-    <link rel="match" href="grouping-ol-type-reftest-002.html" />
     <meta name="assert" content="List items are rendered consistently with the state of the type attribute." />
     <style type="text/css">
         span p {display:list-item; margin-left: 0; margin-top: 0; margin-bottom: 0; padding-left: 0; padding-top: 0; padding-bottom: 0;}