Forward fill and stroke styles from 2d canvas to canvas filters

third_party/WebKit/LayoutTests/fast/canvas/canvas-filter-stroke-paint-gradient.html

Index: third_party/WebKit/LayoutTests/fast/canvas/canvas-filter-stroke-paint-gradient.html
diff --git a/third_party/WebKit/LayoutTests/fast/canvas/canvas-filter-stroke-paint-gradient.html b/third_party/WebKit/LayoutTests/fast/canvas/canvas-filter-stroke-paint-gradient.html
new file mode 100644
index 0000000000000000000000000000000000000000..c17459ac2948014410c5865ea34be4c07a74445f
--- /dev/null
+++ b/third_party/WebKit/LayoutTests/fast/canvas/canvas-filter-stroke-paint-gradient.html
@@ -0,0 +1,22 @@
+<svg style="display: block; width: 0; height: 0" color-interpolation-filters="sRGB">
+  <defs>
+    <filter id="merge">
+      <femerge>
+        <femergenode in="StrokePaint"></femergenode>
+        <femergenode in="SourceGraphic"></femergenode>
+      </femerge>
+    </filter>
+  </defs>
+</svg>
+<canvas id="canvas" width="100" height="100"></canvas>
+<script>
+var canvas = document.getElementById('canvas');
+var ctx = canvas.getContext('2d');
+var gradient = ctx.createLinearGradient(0, 0, canvas.width, 0);
+gradient.addColorStop(0, '#0f0');
+gradient.addColorStop(1, '#00f');
+ctx.filter = 'url(#merge)';
+ctx.strokeStyle = gradient;
+ctx.fillStyle = '#00f';
+ctx.fillRect(40, 40, 20, 20);
+</script>