Deflake inspector/layers/layer-compositing-reasons.html

third_party/WebKit/LayoutTests/inspector/layers/layer-compositing-reasons.html

Index: third_party/WebKit/LayoutTests/inspector/layers/layer-compositing-reasons.html
diff --git a/third_party/WebKit/LayoutTests/inspector/layers/layer-compositing-reasons.html b/third_party/WebKit/LayoutTests/inspector/layers/layer-compositing-reasons.html
index dbfa53a74bc9732fa2d756f0e6e18b2d8b474460..20e7cc44bcadffad42fa67094ff287f3b55dc862 100644
--- a/third_party/WebKit/LayoutTests/inspector/layers/layer-compositing-reasons.html
+++ b/third_party/WebKit/LayoutTests/inspector/layers/layer-compositing-reasons.html
@@ -11,6 +11,9 @@
 <script src="../../http/tests/inspector/inspector-test.js"></script>
 <script src="../../http/tests/inspector/layers-test.js"></script>
 <script>
+if (window.testRunner)
+    testRunner.waitUntilDone();
+
 if (window.internals) {
     document.addEventListener('webkitAnimationStart', function() {
         internals.pauseAnimations(0);