Rotate an image bitmap in ImageLoader extension when loading detached.

ui/file_manager/image_loader/image_loader.js

 // Copyright 2013 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.
 
 /**
  * Loads and resizes an image.
  * @constructor
  */
 function ImageLoader() {
   /**
@@ skipping 50 matching lines @@
           // Sending a response may fail if the receiver already went offline.
           // This is not an error, but a normal and quite common situation.
           var failSafeSendResponse = function(response) {
             try {
               sendResponse(response);
             }
             catch (e) {
               // Ignore the error.
             }
           };
-          if (typeof request.orientation === 'number') {
+          if (request.image_transform) {

[mtomasz, 2017/02/16 08:53:41]

Instead of overriding, can we simply pass the "orientation" parameter in
thumbnail_loader.js? I think it would result in a simpler code.

[yamaguchi, 2017/02/16 14:01:18]

Done.

+            // 'image_transform' option overrides 'orientation' option.
+            request.orientation =
+                ImageOrientation.fromRotationAndScale(request.image_transform);
+          } else if (typeof request.orientation === 'number') {
             request.orientation =
                 ImageOrientation.fromDriveOrientation(request.orientation);
           } else {
             request.orientation = new ImageOrientation(1, 0, 0, 1);
           }
           return this.onMessage_(sender.id,
                                  /** @type {LoadImageRequest} */ (request),
                                  failSafeSendResponse);
         }
       }.bind(this));
@@ skipping 38 matching lines @@
 };
 
 /**
  * Returns the singleton instance.
  * @return {ImageLoader} ImageLoader object.
  */
 ImageLoader.getInstance = function() {
   if (!ImageLoader.instance_)
     ImageLoader.instance_ = new ImageLoader();
   return ImageLoader.instance_;
-};
+};