diff --git a/bin/internal/engine.version b/bin/internal/engine.version
index f0eb09180f5..ecee599fe8d 100644
--- a/bin/internal/engine.version
+++ b/bin/internal/engine.version
@@ -1 +1 @@
-1bc0e1bb9a8db882a21086096cc2b1e0854312b7
+76cb311d9c33720dcd19274228b39ecdbad8d9af
diff --git a/packages/flutter/test/painting/decoration_test.dart b/packages/flutter/test/painting/decoration_test.dart
index 31e79fff8c4..0b67c90c662 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 Image, ColorFilter;
+import 'dart:ui' as ui show EncodingFormat, 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() async {
+  Future<ByteData> toByteData({ui.EncodingFormat format}) 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 279e8a58197..a6809a93785 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() async {
+  Future<ByteData> toByteData({EncodingFormat format}) 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 972f19552a3..9d571526b19 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() async {
+  Future<ByteData> toByteData({ui.EncodingFormat format}) 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 068db569092..510c5661f1e 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() async {
+  Future<ByteData> toByteData({ui.EncodingFormat format}) 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 0d4f2e99dbe..402e83fc816 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 Image;
+import 'dart:ui' as ui show EncodingFormat, 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() async {
+  Future<ByteData> toByteData({ui.EncodingFormat format}) 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() async {
+  Future<ByteData> toByteData({ui.EncodingFormat format}) 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() async {
+  Future<ByteData> toByteData({ui.EncodingFormat format}) 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 be4c35b8ddd..19036366b49 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 Image;
+import 'dart:ui' as ui show EncodingFormat, 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() async {
+  Future<ByteData> toByteData({ui.EncodingFormat format}) 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 553cf6f3edb..492a326827a 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 Image;
+import 'dart:ui' as ui show EncodingFormat, 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() async {
+  Future<ByteData> toByteData({ui.EncodingFormat format}) 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 91343a9715c..a060f99bc27 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 Image;
+import 'dart:ui' as ui show EncodingFormat, 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() async {
+  Future<ByteData> toByteData({ui.EncodingFormat format}) async {
     throw new UnsupportedError('Cannot encode test image');
   }
 
diff --git a/packages/flutter_tools/lib/src/test/flutter_platform.dart b/packages/flutter_tools/lib/src/test/flutter_platform.dart
index 8155e7ddd1c..7c0ca7a8f8d 100644
--- a/packages/flutter_tools/lib/src/test/flutter_platform.dart
+++ b/packages/flutter_tools/lib/src/test/flutter_platform.dart
@@ -275,7 +275,7 @@ class _FlutterPlatform extends PlatformPlugin {
 
     dynamic outOfBandError; // error that we couldn't send to the harness that we need to send via our future
 
-    final List<_Finalizer> finalizers = <_Finalizer>[];  // Note: will be run in reverse order.
+    final List<_Finalizer> finalizers = <_Finalizer>[];
     bool subprocessActive = false;
     bool controllerSinkClosed = false;
     try {
@@ -511,7 +511,7 @@ class _FlutterPlatform extends PlatformPlugin {
       }
     } finally {
       printTrace('test $ourTestCount: cleaning up...');
-      for (_Finalizer finalizer in finalizers.reversed) {
+      for (_Finalizer finalizer in finalizers) {
         try {
           await finalizer();
         } catch (error, stack) {