Remove isUnclippedDescendant.

LayoutTests/compositing/overflow/resources/nested-render-surfaces.js

Index: LayoutTests/compositing/overflow/resources/nested-render-surfaces.js
diff --git a/LayoutTests/compositing/overflow/resources/nested-render-surfaces.js b/LayoutTests/compositing/overflow/resources/nested-render-surfaces.js
deleted file mode 100644
index be5f06ea79925edd616e49fbb0f9821687ffd32f..0000000000000000000000000000000000000000
--- a/LayoutTests/compositing/overflow/resources/nested-render-surfaces.js
+++ /dev/null
@@ -1,22 +0,0 @@
-if (window.testRunner)
-    testRunner.dumpAsTextWithPixelResults();
-
-function runTest(description) {
-    var pre = document.createElement("pre");
-    document.body.appendChild(pre);
-
-    if (!window.internals) {
-        pre.innerHTML = description;
-    } else {
-        var isUnclipped = window.internals.isUnclippedDescendant(document.getElementById('fixed'));
-        pre.innerHTML = "\n'fixed' " + (isUnclipped ? "is" : "is not") + " an unclipped descendant.";
-
-        if (isUnclipped) {
-            pre.innerHTML += "\nPASS";
-        } else {
-            pre.innerHTML += "\nUnclipped Descendants are only relevant for " +
-                "preferCompositingToLCDText, so this result is " +
-                "expected everywhere except in the virtual/gpu/ suite.";
-        }
-    }
-}