Moved ChromeOS Image Editor into an iframe.

chrome/browser/resources/file_manager/js/image_editor/image_editor.css

Index: chrome/browser/resources/file_manager/js/image_editor/image_editor.css
diff --git a/chrome/browser/resources/file_manager/js/image_editor/image_editor.css b/chrome/browser/resources/file_manager/js/image_editor/image_editor.css
index 8936bfd83057dfd314e8fe798c63b8fe12e8a871..4a47f756474d4bc9c3df37724ea42ae2fa3bb5e0 100644
--- a/chrome/browser/resources/file_manager/js/image_editor/image_editor.css
+++ b/chrome/browser/resources/file_manager/js/image_editor/image_editor.css
@@ -4,21 +4,18 @@
  * found in the LICENSE file.
  */
 
+/* Main container div for the editor */
 .image-editor {
   background: white;
   position: absolute;
-  left: 2px;
-  top: 2px;
-  right: 2px;
-  bottom: 2px;
-  z-index: 100;
+  width: 100%;
+  height: 100%;
 }
 
+/* Editor toolbar */
 .toolbar {
   width: 100%;
   height: 32px;
-  border: 1px solid black;
-  border-bottom-width: 0;
 }
 
 .toolbar button {
@@ -35,14 +32,15 @@
   margin-right: 10px;
 }
 
+/* The container div for the main canvas */
 .canvas-wrapper {
   position: absolute;
   width: 100%;
   top: 32px;
   bottom: 0;
-  border: 1px solid black;
 }
 
+/* Scaling controls */
 .scale-tool {
   position: absolute;
   width: 275px;