Implementing ImageBitmap option imageOrientation of flipY

third_party/WebKit/Source/core/imagebitmap/ImageBitmapOptions.idl

Index: third_party/WebKit/Source/core/imagebitmap/ImageBitmapOptions.idl
diff --git a/third_party/WebKit/Source/core/imagebitmap/ImageBitmapOptions.idl b/third_party/WebKit/Source/core/imagebitmap/ImageBitmapOptions.idl
index 2f54dd070457f714e7993b0ad361f50c7802e537..f4dac6604128702fdfc74e2c4f5ec3825f20b8c8 100644
--- a/third_party/WebKit/Source/core/imagebitmap/ImageBitmapOptions.idl
+++ b/third_party/WebKit/Source/core/imagebitmap/ImageBitmapOptions.idl
@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+enum ImageOrientation { "none", "flipY" };
 dictionary ImageBitmapOptions {
     boolean premuiltiplyAlpha;
+    ImageOrientation imageOrientation = "none";
 };