Support event handling in SVG's use-element shadow trees

third_party/WebKit/LayoutTests/svg/custom/use-event-handler-on-referenced-element.svg

Index: third_party/WebKit/LayoutTests/svg/custom/use-event-handler-on-referenced-element.svg
diff --git a/third_party/WebKit/LayoutTests/svg/custom/use-event-handler-on-referenced-element.svg b/third_party/WebKit/LayoutTests/svg/custom/use-event-handler-on-referenced-element.svg
new file mode 100644
index 0000000000000000000000000000000000000000..48020a70c70b7e90199d19529eee6a6f7a36e6c1
--- /dev/null
+++ b/third_party/WebKit/LayoutTests/svg/custom/use-event-handler-on-referenced-element.svg
@@ -0,0 +1,31 @@
+<svg version="1.1" baseProfile="basic" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" onload="runRepaintAndPixelTest()">
+  <script xlink:href="../../paint/invalidation/resources/text-based-repaint.js"/>
+  <defs>
+   <rect onclick="test()" id="reference" x="240" y="1" width="239" height="358"/>
+
+   <script type="text/ecmascript">
+    <![CDATA[
+    window.outputRepaintRects = false;
+    function repaintTest() {
+        if (window.eventSender) {
+            testRunner.waitUntilDone();
+            eventSender.mouseMoveTo(250, 50);
+            eventSender.mouseDown();
+            eventSender.mouseUp();
+        }
+    }
+
+    function test() {
+        document.getElementById("text").firstChild.nodeValue = "Test passed.";
+        if (window.testRunner)
+            testRunner.notifyDone();
+    }
+    ]]>
+    </script>
+  </defs>
+
+  <use id="use" xlink:href="#reference" fill="grey"/>
+
+  <text id="text" transform="translate(5,20)">Test failed.</text>
+  <rect id="test-frame" x="1" y="1" width="478" height="358" fill="none" stroke="#000"/>
+</svg>