Roll 50: Copied IDLs, PYTHON scripts from WebKit removed deleted files in WebCore

core/dom/IntersectionObserverEntry.idl

Index: core/dom/IntersectionObserverEntry.idl
diff --git a/core/dom/IntersectionObserverEntry.idl b/core/dom/IntersectionObserverEntry.idl
new file mode 100644
index 0000000000000000000000000000000000000000..14d72684ba79d79c661f29ddacd0983db5399268
--- /dev/null
+++ b/core/dom/IntersectionObserverEntry.idl
@@ -0,0 +1,16 @@
+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// https://github.com/slightlyoff/IntersectionObserver
+
+[
+    GarbageCollected,
+    RuntimeEnabled=IntersectionObserver,
+] interface IntersectionObserverEntry {
+    readonly attribute ClientRect boundingClientRect;
+    readonly attribute ClientRect intersectionRect;
+    readonly attribute ClientRect? rootBounds;
+    readonly attribute Element target;
+    readonly attribute DOMHighResTimeStamp time;
+};