Import Cobalt 19.master.0.203780 Includes the following patches: https://cobalt-review.googlesource.com/c/cobalt/+/5210 by errong.leng@samsung.com https://cobalt-review.googlesource.com/c/cobalt/+/5270 by linus.wang@samsung.com

diff --git a/src/third_party/web_platform_tests/2dcontext/shadows/2d.shadow.pattern.transparent.1.html b/src/third_party/web_platform_tests/2dcontext/shadows/2d.shadow.pattern.transparent.1.html
new file mode 100644
index 0000000..fcdda5a
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+++ b/src/third_party/web_platform_tests/2dcontext/shadows/2d.shadow.pattern.transparent.1.html

@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by tools/gentest.py. -->
+<title>Canvas test: 2d.shadow.pattern.transparent.1</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/common/canvas-tests.js"></script>
+<link rel="stylesheet" href="/common/canvas-tests.css">
+<body class="show_output">
+
+<h1>2d.shadow.pattern.transparent.1</h1>
+<p class="desc">Shadows are not drawn for transparent fill patterns</p>
+
+
+<p class="output">Actual output:</p>
+<canvas id="c" class="output" width="100" height="50"><p class="fallback">FAIL (fallback content)</p></canvas>
+<p class="output expectedtext">Expected output:<p><img src="/images/green-100x50.png" class="output expected" id="expected" alt="">
+<ul id="d"></ul>
+<script>
+var t = async_test("Shadows are not drawn for transparent fill patterns");
+_addTest(function(canvas, ctx) {
+
+var pattern = ctx.createPattern(document.getElementById('transparent.png'), 'repeat');
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+ctx.shadowColor = '#f00';
+ctx.shadowOffsetY = 50;
+ctx.fillStyle = pattern;
+ctx.fillRect(0, -50, 100, 50);
+
+_assertPixel(canvas, 50,25, 0,255,0,255, "50,25", "0,255,0,255");
+
+
+});
+</script>
+<img src="/images/transparent.png" id="transparent.png" class="resource">
+