Rotate an image bitmap in ImageLoader extension when loading detached.

ui/file_manager/file_manager/foreground/js/thumbnail_loader.js

Index: ui/file_manager/file_manager/foreground/js/thumbnail_loader.js
diff --git a/ui/file_manager/file_manager/foreground/js/thumbnail_loader.js b/ui/file_manager/file_manager/foreground/js/thumbnail_loader.js
index 65d012ff2b42fc2a541101782b7be95f58bd8dfc..a2032d530c22d188fc8ddb90efb5c01b3a30416e 100644
--- a/ui/file_manager/file_manager/foreground/js/thumbnail_loader.js
+++ b/ui/file_manager/file_manager/foreground/js/thumbnail_loader.js
@@ -460,16 +460,27 @@ ThumbnailLoader.prototype.loadDetachedImage = function(callback) {
                          this.metadata_.filesystem &&
                          this.metadata_.filesystem.modificationTime &&
                          this.metadata_.filesystem.modificationTime.getTime();
+  var loader_options = {

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

nit: camelCase for variable names in JS.

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

Done.

+      maxWidth: ThumbnailLoader.THUMBNAIL_MAX_WIDTH,
+      maxHeight: ThumbnailLoader.THUMBNAIL_MAX_HEIGHT,
+      cache: true,
+      priority: this.priority_,
+      timestamp: modificationTime
+  };
+  if (this.metadata_ && this.metadata_.media &&
+      this.metadata_.media.imageTransform) {
+    loader_options.image_transform = this.metadata_.media.imageTransform;
+  }
+  // Comsume the transform parameter to avoid duplicated transformation in
+  // getImage().
+  // TODO(yamaguchi): remove this line when we move the image transformation
+  // logic out of this class.
+  this.transform_ = undefined;
+
   this.taskId_ = ImageLoaderClient.loadToImage(
       this.thumbnailUrl_,
       this.image_,
-      {
-        maxWidth: ThumbnailLoader.THUMBNAIL_MAX_WIDTH,
-        maxHeight: ThumbnailLoader.THUMBNAIL_MAX_HEIGHT,
-        cache: true,
-        priority: this.priority_,
-        timestamp: modificationTime
-      },
+      loader_options,
       function() {},
       function() {
         this.image_.onerror(new Event('load-error'));