Gallery.app: Fix image rotation in the image editor.

ui/file_manager/gallery/js/image_editor/image_encoder.js

Index: ui/file_manager/gallery/js/image_editor/image_encoder.js
diff --git a/ui/file_manager/gallery/js/image_editor/image_encoder.js b/ui/file_manager/gallery/js/image_editor/image_encoder.js
index fb8442c13e6c98b34cf2abb365fcfb33410932ed..f1817b93e811a0609b301edefc21137d616631c8 100644
--- a/ui/file_manager/gallery/js/image_editor/image_encoder.js
+++ b/ui/file_manager/gallery/js/image_editor/image_encoder.js
@@ -32,7 +32,8 @@ ImageEncoder.registerMetadataEncoder = function(constructor, mimeType) {
  * @return {ImageEncoder.MetadataEncoder} Created metadata encoder.
  */
 ImageEncoder.createMetadataEncoder = function(metadata) {
-  var constructor = ImageEncoder.metadataEncoders[metadata.mimeType] ||
+  var constructor =
+      (metadata && ImageEncoder.metadataEncoders[metadata.mimeType]) ||
       ImageEncoder.MetadataEncoder;
   return new constructor(metadata);
 };
@@ -208,6 +209,7 @@ ImageEncoder.MetadataEncoder.prototype.setThumbnailData =
     function(canvas, quality) {
   this.metadata_.thumbnailURL =
       canvas.toDataURL(this.metadata_.mimeType, quality);
+  delete this.metadata_.thumbnailTransform;
 };
 
 /**
@@ -216,7 +218,7 @@ ImageEncoder.MetadataEncoder.prototype.setThumbnailData =
  * @return {Object} An object with from and to properties.
  */
 ImageEncoder.MetadataEncoder.prototype.
-    findInsertionRange = function(encodedImage) { return {from: 0, to: 0} };
+    findInsertionRange = function(encodedImage) { return {from: 0, to: 0}; };
 
 /**
  * Return serialized metadata ready to write to an image file.