DevTools: hide page overlay layers in LayerTreeAgent

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

Index: LayoutTests/inspector/layers/layer-compositing-reasons.html
diff --git a/LayoutTests/inspector/layer-compositing-reasons.html b/LayoutTests/inspector/layers/layer-compositing-reasons.html
similarity index 95%
rename from LayoutTests/inspector/layer-compositing-reasons.html
rename to LayoutTests/inspector/layers/layer-compositing-reasons.html
index 03010220683d35955845f2b1316cfe5733d5e4c1..bd57ff03fff95551d2e2ee13096a0be52e02eab7 100644
--- a/LayoutTests/inspector/layer-compositing-reasons.html
+++ b/LayoutTests/inspector/layers/layer-compositing-reasons.html
@@ -8,8 +8,8 @@
 }
 
 </style>
-<script src="../http/tests/inspector/inspector-test.js"></script>
-<script src="../http/tests/inspector/layers-test.js"></script>
+<script src="../../http/tests/inspector/inspector-test.js"></script>
+<script src="../../http/tests/inspector/layers-test.js"></script>
 <script>
 if (window.internals) {
     document.addEventListener('webkitAnimationStart', function() {