Skip canvas filter construction in frameless documents

third_party/WebKit/LayoutTests/fast/canvas/canvas-filter-frameless-document.html

Index: third_party/WebKit/LayoutTests/fast/canvas/canvas-filter-frameless-document.html
diff --git a/third_party/WebKit/LayoutTests/fast/canvas/canvas-filter-frameless-document.html b/third_party/WebKit/LayoutTests/fast/canvas/canvas-filter-frameless-document.html
new file mode 100644
index 0000000000000000000000000000000000000000..97c0ab47639d0ff810b6996461834fefb79d5071
--- /dev/null
+++ b/third_party/WebKit/LayoutTests/fast/canvas/canvas-filter-frameless-document.html
@@ -0,0 +1,17 @@
+<script>
+if (window.testRunner)
+    testRunner.dumpAsText();
+
+var canvas1 = document.createElement('canvas');
+var ctx1 = canvas1.getContext('2d');
+var htmlDoc = document.implementation.createHTMLDocument('', '', null);
+htmlDoc.adoptNode(canvas1);
+var canvas2 = htmlDoc.createElement('canvas');
+var ctx2 = canvas2.getContext('2d');
+
+ctx1.filter = 'drop-shadow(1em 0.5em black)';
+ctx2.filter = 'drop-shadow(1em 0.5em black)';
+ctx1.fillRect(25, 25, 50, 40);
+ctx2.fillRect(25, 25, 50, 40);
+</script>
+This test passes if it doesn't crash.