Moved ChromeOS Image Editor into an iframe.

chrome/browser/resources/file_manager/css/file_manager.css

 /*
  * Copyright (c) 2011 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.
  */
 
 /* Outer frame of the dialog. */
 body {
   -webkit-box-flex: 1;
   -webkit-box-orient: vertical;
@@ skipping 402 matching lines @@
   -webkit-box-flex: 1;
   display: -webkit-box;
 }
 
 /* A vertical spring. */
 .vertical-spacer {
   -webkit-box-orient: vertical;
   -webkit-box-flex: 1;
   display: -webkit-box;
 }
+
+/* Overlay pane covering the entire file manager window (e.g. image editor)*/
+.overlay-pane {
+  position: absolute;
+  top: 0;
+  left: 0;
+  width: 100%;
+  height: 100%;
+  border: none;
+  z-index: 100;
+}