Take the rotation information from the right source.

ui/file_manager/file_manager/foreground/js/thumbnail_loader_unittest.js

Index: ui/file_manager/file_manager/foreground/js/thumbnail_loader_unittest.js
diff --git a/ui/file_manager/file_manager/foreground/js/thumbnail_loader_unittest.js b/ui/file_manager/file_manager/foreground/js/thumbnail_loader_unittest.js
index 509a4b069598f9292894bc80cfd8907674692c0d..e0c7f887947635df5bb8d54582070aa3927c4567 100644
--- a/ui/file_manager/file_manager/foreground/js/thumbnail_loader_unittest.js
+++ b/ui/file_manager/file_manager/foreground/js/thumbnail_loader_unittest.js
@@ -175,6 +175,8 @@ function testLoadDetachedFromExifInCavnasModeThumbnailDoesNotRotate(callback) {
       load: function(url, callback, opt_option) {
         // Assert that data url is passed.
         assertTrue(/^data:/i.test(url));
+        // Assert that the rotation is propagated to ImageLoader.
+        assertEquals(1, opt_option.orientation.rotate90);
         // ImageLoader returns rotated image.
         callback({status: 'success', data: generateSampleImageDataUrl(32, 64),
             width: 32, height: 64});