diff --git a/bin/internal/engine.version b/bin/internal/engine.version
index 92e00c9..6f0978c 100644
--- a/bin/internal/engine.version
+++ b/bin/internal/engine.version
@@ -1 +1 @@
-56bad48ab2eda51906e27adc1f61b89f26224bbc
+f3ff83a5db71262d240aa5337a2a9a22c73c4749
diff --git a/packages/flutter/lib/src/widgets/platform_view.dart b/packages/flutter/lib/src/widgets/platform_view.dart
index c2698a1..e753c48 100644
--- a/packages/flutter/lib/src/widgets/platform_view.dart
+++ b/packages/flutter/lib/src/widgets/platform_view.dart
@@ -50,7 +50,7 @@
   ///
   /// The `viewType`, `hitTestBehavior`, and `gestureRecognizers` parameters must not be null.
   /// If `creationParams` is not null then `creationParamsCodec` must not be null.
-  AndroidView({
+  AndroidView({ // ignore: prefer_const_constructors_in_immutables
     Key key,
     @required this.viewType,
     this.onPlatformViewCreated,
diff --git a/packages/flutter/lib/src/widgets/scroll_view.dart b/packages/flutter/lib/src/widgets/scroll_view.dart
index 5827504..98bb169 100644
--- a/packages/flutter/lib/src/widgets/scroll_view.dart
+++ b/packages/flutter/lib/src/widgets/scroll_view.dart
@@ -50,7 +50,7 @@
   /// Creates a widget that scrolls.
   ///
   /// If the [primary] argument is true, the [controller] must be null.
-  ScrollView({
+  ScrollView({ // ignore: prefer_const_constructors_in_immutables
     Key key,
     this.scrollDirection = Axis.vertical,
     this.reverse = false,
diff --git a/packages/flutter/lib/src/widgets/single_child_scroll_view.dart b/packages/flutter/lib/src/widgets/single_child_scroll_view.dart
index 38879d0..cff514a 100644
--- a/packages/flutter/lib/src/widgets/single_child_scroll_view.dart
+++ b/packages/flutter/lib/src/widgets/single_child_scroll_view.dart
@@ -183,7 +183,7 @@
 /// * [Scrollable], which handles arbitrary scrolling effects.
 class SingleChildScrollView extends StatelessWidget {
   /// Creates a box in which a single widget can be scrolled.
-  SingleChildScrollView({
+  SingleChildScrollView({ // ignore: prefer_const_constructors_in_immutables
     Key key,
     this.scrollDirection = Axis.vertical,
     this.reverse = false,