diff --git a/bin/internal/engine.version b/bin/internal/engine.version
index ecee599fe8d..136bcaad8ee 100644
--- a/bin/internal/engine.version
+++ b/bin/internal/engine.version
@@ -1 +1 @@
-76cb311d9c33720dcd19274228b39ecdbad8d9af
+0c09bf03d1dcde1a6c8cfaa2102949abac7757cd
diff --git a/packages/flutter/test/painting/decoration_test.dart b/packages/flutter/test/painting/decoration_test.dart
index 0b67c90c662..31e79fff8c4 100644
--- a/packages/flutter/test/painting/decoration_test.dart
+++ b/packages/flutter/test/painting/decoration_test.dart
@@ -4,7 +4,7 @@
 
 import 'dart:async';
 import 'dart:typed_data';
-import 'dart:ui' as ui show EncodingFormat, Image, ColorFilter;
+import 'dart:ui' as ui show Image, ColorFilter;
 
 import 'package:flutter/foundation.dart';
 import 'package:flutter/painting.dart';
@@ -90,7 +90,7 @@ class TestImage implements ui.Image {
   void dispose() { }
 
   @override
-  Future<ByteData> toByteData({ui.EncodingFormat format}) async {
+  Future<ByteData> toByteData() async {
     throw new UnsupportedError('Cannot encode test image');
   }
 }
diff --git a/packages/flutter/test/painting/image_stream_test.dart b/packages/flutter/test/painting/image_stream_test.dart
index a6809a93785..279e8a58197 100644
--- a/packages/flutter/test/painting/image_stream_test.dart
+++ b/packages/flutter/test/painting/image_stream_test.dart
@@ -40,7 +40,7 @@ class FakeImage implements Image {
   void dispose() {}
 
   @override
-  Future<ByteData> toByteData({EncodingFormat format}) async {
+  Future<ByteData> toByteData() async {
     throw new UnsupportedError('Cannot encode test image');
   }
 }
diff --git a/packages/flutter/test/painting/paint_image_test.dart b/packages/flutter/test/painting/paint_image_test.dart
index 9d571526b19..972f19552a3 100644
--- a/packages/flutter/test/painting/paint_image_test.dart
+++ b/packages/flutter/test/painting/paint_image_test.dart
@@ -23,7 +23,7 @@ class TestImage implements ui.Image {
   void dispose() { }
 
   @override
-  Future<ByteData> toByteData({ui.EncodingFormat format}) async {
+  Future<ByteData> toByteData() async {
     throw new UnsupportedError('Cannot encode test image');
   }
 }
diff --git a/packages/flutter/test/painting/shape_decoration_test.dart b/packages/flutter/test/painting/shape_decoration_test.dart
index 510c5661f1e..068db569092 100644
--- a/packages/flutter/test/painting/shape_decoration_test.dart
+++ b/packages/flutter/test/painting/shape_decoration_test.dart
@@ -125,7 +125,7 @@ class TestImage implements ui.Image {
   void dispose() { }
 
   @override
-  Future<ByteData> toByteData({ui.EncodingFormat format}) async {
+  Future<ByteData> toByteData() async {
     throw new UnsupportedError('Cannot encode test image');
   }
 }
diff --git a/packages/flutter/test/rendering/image_test.dart b/packages/flutter/test/rendering/image_test.dart
index 402e83fc816..0d4f2e99dbe 100644
--- a/packages/flutter/test/rendering/image_test.dart
+++ b/packages/flutter/test/rendering/image_test.dart
@@ -4,7 +4,7 @@
 
 import 'dart:async';
 import 'dart:typed_data';
-import 'dart:ui' as ui show EncodingFormat, Image;
+import 'dart:ui' as ui show Image;
 
 import 'package:flutter/rendering.dart';
 import 'package:flutter_test/flutter_test.dart';
@@ -19,7 +19,7 @@ class SquareImage implements ui.Image {
   int get height => 10;
 
   @override
-  Future<ByteData> toByteData({ui.EncodingFormat format}) async {
+  Future<ByteData> toByteData() async {
     throw new UnsupportedError('Cannot encode test image');
   }
 
@@ -38,7 +38,7 @@ class WideImage implements ui.Image {
   int get height => 10;
 
   @override
-  Future<ByteData> toByteData({ui.EncodingFormat format}) async {
+  Future<ByteData> toByteData() async {
     throw new UnsupportedError('Cannot encode test image');
   }
 
@@ -57,7 +57,7 @@ class TallImage implements ui.Image {
   int get height => 20;
 
   @override
-  Future<ByteData> toByteData({ui.EncodingFormat format}) async {
+  Future<ByteData> toByteData() async {
     throw new UnsupportedError('Cannot encode test image');
   }
 
diff --git a/packages/flutter/test/widgets/image_resolution_test.dart b/packages/flutter/test/widgets/image_resolution_test.dart
index 19036366b49..be4c35b8ddd 100644
--- a/packages/flutter/test/widgets/image_resolution_test.dart
+++ b/packages/flutter/test/widgets/image_resolution_test.dart
@@ -4,7 +4,7 @@
 
 import 'dart:async';
 import 'dart:typed_data';
-import 'dart:ui' as ui show EncodingFormat, Image;
+import 'dart:ui' as ui show Image;
 
 import 'package:flutter/foundation.dart';
 import 'package:flutter/rendering.dart';
@@ -26,7 +26,7 @@ class TestImage implements ui.Image {
   void dispose() { }
 
   @override
-  Future<ByteData> toByteData({ui.EncodingFormat format}) async {
+  Future<ByteData> toByteData() async {
     throw new UnsupportedError('Cannot encode test image');
   }
 }
diff --git a/packages/flutter/test/widgets/image_rtl_test.dart b/packages/flutter/test/widgets/image_rtl_test.dart
index 492a326827a..553cf6f3edb 100644
--- a/packages/flutter/test/widgets/image_rtl_test.dart
+++ b/packages/flutter/test/widgets/image_rtl_test.dart
@@ -4,7 +4,7 @@
 
 import 'dart:async';
 import 'dart:typed_data';
-import 'dart:ui' as ui show EncodingFormat, Image;
+import 'dart:ui' as ui show Image;
 
 import 'package:flutter/foundation.dart';
 import 'package:flutter/widgets.dart';
@@ -37,7 +37,7 @@ class TestImage implements ui.Image {
   void dispose() { }
 
   @override
-  Future<ByteData> toByteData({ui.EncodingFormat format}) async {
+  Future<ByteData> toByteData() async {
     throw new UnsupportedError('Cannot encode test image');
   }
 }
diff --git a/packages/flutter/test/widgets/image_test.dart b/packages/flutter/test/widgets/image_test.dart
index a060f99bc27..91343a9715c 100644
--- a/packages/flutter/test/widgets/image_test.dart
+++ b/packages/flutter/test/widgets/image_test.dart
@@ -4,7 +4,7 @@
 
 import 'dart:async';
 import 'dart:typed_data';
-import 'dart:ui' as ui show EncodingFormat, Image;
+import 'dart:ui' as ui show Image;
 
 import 'package:flutter/foundation.dart';
 import 'package:flutter/rendering.dart';
@@ -484,7 +484,7 @@ class TestImage implements ui.Image {
   void dispose() { }
 
   @override
-  Future<ByteData> toByteData({ui.EncodingFormat format}) async {
+  Future<ByteData> toByteData() async {
     throw new UnsupportedError('Cannot encode test image');
   }