SVG: Test pointer-events computed value

Like other CSS keywords, pointer-events keywords serialize in lower case.
https://svgwg.org/svg2-draft/interact.html#PointerEventsProperty

Change-Id: Iae5aed5cb8280f6b6df84024d076252af59cff11
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1706214
Commit-Queue: Eric Willigers <ericwilligers@chromium.org>
Reviewed-by: Anders Hartvoll Ruud <andruud@chromium.org>
Reviewed-by: Fredrik Söderquist <fs@opera.com>
Cr-Commit-Position: refs/heads/master@{#678493}

third_party/blink/web_tests/external/wpt/svg/interact/parsing/pointer-events-computed.svg

+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:h="http://www.w3.org/1999/xhtml"
+     width="800px" height="8000px">
+  <title>SVG Scripting and Interactivity: getComputedStyle().pointerEvents</title>
+  <metadata>
+    <h:link rel="help" href="https://svgwg.org/svg2-draft/interact.html#PointerEventsProperty"/>
+    <h:meta name="assert" content="pointer-events computed value is as specified."/>
+  </metadata>
+  <g id="target"></g>
+  <h:script src="/resources/testharness.js"/>
+  <h:script src="/resources/testharnessreport.js"/>
+  <h:script src="/css/support/computed-testcommon.js"/>
+  <script><![CDATA[
+
+test_computed_value("pointer-events", "auto");
+test_computed_value("pointer-events", "bounding-box");
+test_computed_value("pointer-events", "visiblepainted");
+test_computed_value("pointer-events", "visiblefill");
+test_computed_value("pointer-events", "visiblestroke");
+test_computed_value("pointer-events", "visible");
+test_computed_value("pointer-events", "painted");
+test_computed_value("pointer-events", "fill");
+test_computed_value("pointer-events", "stroke");
+test_computed_value("pointer-events", "all");
+test_computed_value("pointer-events", "none");
+
+  ]]></script>
+</svg>

third_party/blink/web_tests/external/wpt/svg/interact/parsing/pointer-events-invalid.svg

-<?xml version="1.0" encoding="UTF-8"?>
 <svg xmlns="http://www.w3.org/2000/svg"
      xmlns:h="http://www.w3.org/1999/xhtml"
      width="800px" height="8000px">

third_party/blink/web_tests/external/wpt/svg/interact/parsing/pointer-events-valid-expected.txt

-This is a testharness.js-based test.
-PASS e.style['pointer-events'] = "auto" should set the property value
-PASS e.style['pointer-events'] = "bounding-box" should set the property value
-FAIL e.style['pointer-events'] = "visiblePainted" should set the property value assert_equals: serialization should be canonical expected "visiblePainted" but got "visiblepainted"
-FAIL e.style['pointer-events'] = "visibleFill" should set the property value assert_equals: serialization should be canonical expected "visibleFill" but got "visiblefill"
-FAIL e.style['pointer-events'] = "visibleStroke" should set the property value assert_equals: serialization should be canonical expected "visibleStroke" but got "visiblestroke"
-PASS e.style['pointer-events'] = "visible" should set the property value
-PASS e.style['pointer-events'] = "painted" should set the property value
-PASS e.style['pointer-events'] = "fill" should set the property value
-PASS e.style['pointer-events'] = "stroke" should set the property value
-PASS e.style['pointer-events'] = "all" should set the property value
-PASS e.style['pointer-events'] = "none" should set the property value
-Harness: the test ran to completion.
-

third_party/blink/web_tests/external/wpt/svg/interact/parsing/pointer-events-valid.svg

-<?xml version="1.0" encoding="UTF-8"?>
 <svg xmlns="http://www.w3.org/2000/svg"
      xmlns:h="http://www.w3.org/1999/xhtml"
      width="800px" height="8000px">
@@ -15,9 +14,9 @@
 
 test_valid_value("pointer-events", "auto");
 test_valid_value("pointer-events", "bounding-box");
-test_valid_value("pointer-events", "visiblePainted");
-test_valid_value("pointer-events", "visibleFill");
-test_valid_value("pointer-events", "visibleStroke");
+test_valid_value("pointer-events", "visiblePainted", "visiblepainted");
+test_valid_value("pointer-events", "visibleFill", "visiblefill");
+test_valid_value("pointer-events", "visibleStroke", "visiblestroke");
 test_valid_value("pointer-events", "visible");
 test_valid_value("pointer-events", "painted");
 test_valid_value("pointer-events", "fill");