Implement DOMRect of geometry interfaces.

Source/core/dom/DOMRectReadOnly.idl

Index: Source/core/dom/DOMRectReadOnly.idl
diff --git a/Source/core/dom/DOMRectReadOnly.idl b/Source/core/dom/DOMRectReadOnly.idl
new file mode 100644
index 0000000000000000000000000000000000000000..50e05a55402b596fa90f49853bba6e478143b71e
--- /dev/null
+++ b/Source/core/dom/DOMRectReadOnly.idl
@@ -0,0 +1,19 @@
+// Copyright 2014 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.
+
+[
+    Constructor(unrestricted double x, unrestricted double y,
+                unrestricted double width, unrestricted double height),
+    GarbageCollected,
+    RuntimeEnabled=GeometryInterfaces,
+] interface DOMRectReadOnly {
+    readonly attribute unrestricted double x;
+    readonly attribute unrestricted double y;
+    readonly attribute unrestricted double width;
+    readonly attribute unrestricted double height;
+    readonly attribute unrestricted double top;
+    readonly attribute unrestricted double right;
+    readonly attribute unrestricted double bottom;
+    readonly attribute unrestricted double left;
+};