[css-masking] Migrate clip-path-reference-restore.html to WPT

CL migrates clip-path-reference-restore.html to external/wpt/css/css-masking/clip-path/, adding links to the relevant specs and a test assertion describing its purpose. BUG=1063749 Change-Id: I2edd1a97f7c99dd70710c88a1d9f67c6feeff852 Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2143176 Commit-Queue: Miyoung Shin <myid.shin@igalia.com> Reviewed-by: Fredrik Söderquist <fs@opera.com> Cr-Commit-Position: refs/heads/master@{#759599}

[css-masking] Migrate clip-path-reference-restore.html to WPT
CL migrates clip-path-reference-restore.html to external/wpt/css/css-masking/clip-path/, adding links to the relevant specs and a test assertion describing its purpose. BUG=1063749 Change-Id: I2edd1a97f7c99dd70710c88a1d9f67c6feeff852 Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2143176 Commit-Queue: Miyoung Shin <myid.shin@igalia.com> Reviewed-by: Fredrik Söderquist <fs@opera.com> Cr-Commit-Position: refs/heads/master@{#759599}
6e9e874e · Miyoung Shin · Commit Bot · 23de01f7 · 6e9e874e · 6e9e874e
Commit 6e9e874e authored Apr 16, 2020 by Miyoung Shin Committed by Commit Bot Apr 16, 2020
2 changed files
--- a/third_party/blink/web_tests/css3/masking/clip-path-reference-restore.html
+++ b/third_party/blink/web_tests/css3/masking/clip-path-reference-restore.html
 <!DOCTYPE html>
+<title>CSS Masking: Consecutive clip-paths don't affect each other.</title>
+<link rel="author" title="Fredrik Söderquist" href="mailto:fs@opera.com">
+<link rel="help" href="https://drafts.fxtf.org/css-masking-1/#the-clip-path">
+<link rel="issue" href="https://crbug.com/391291">
+<link rel="match" href="reference/clip-path-reference-restore-ref.html">
+<meta name="assert" content="Check that consecutive clip-paths don't affect each other"/>
 <style>
 .error {
  width: 100px;
@@ -10,7 +16,7 @@
  width: 200px;
  height: 50px;
  background-color: green;
-  -webkit-clip-path: url(#c);
+  clip-path: url(#c);
 }
 </style>
 <div class="error"></div>

--- a/third_party/blink/web_tests/css3/masking/clip-path-reference-restore-expected.html
+++ b/third_party/blink/web_tests/css3/masking/clip-path-reference-restore-expected.html