Roll engine to c5a63d (#19288)

bin/internal/engine.version

-fed2ea458ed49088d33eddabc546ba56d600c717
+c5a63d28bf3735569c8187753bc490d8351a8363

dev/tools/dartdoc.dart

@@ -307,6 +307,7 @@ List<FileSystemEntity> findPackages() {
       // TODO(ianh): Use a real YAML parser here
       return !pubspec.readAsStringSync().contains('nodoc: true');
     })
+    .cast<Directory>()
     .toList();
 }
 

packages/flutter/test/widgets/custom_painter_test.dart

@@ -349,7 +349,8 @@ void _defineTests() {
     ));
 
     final Set<SemanticsAction> allActions = SemanticsAction.values.values.toSet()
-      ..remove(SemanticsAction.showOnScreen); // showOnScreen is non user-exposed.
+      ..remove(SemanticsAction.customAction) // customAction is not user-exposed.
+      ..remove(SemanticsAction.showOnScreen); // showOnScreen is not user-exposed.
 
     const int expectedId = 2;
     final TestSemantics expectedSemantics = new TestSemantics.root(

packages/flutter/test/widgets/semantics_test.dart

@@ -415,7 +415,8 @@ void main() {
     );
 
     final Set<SemanticsAction> allActions = SemanticsAction.values.values.toSet()
-      ..remove(SemanticsAction.showOnScreen); // showOnScreen is non user-exposed.
+      ..remove(SemanticsAction.customAction) // customAction is not user-exposed.
+      ..remove(SemanticsAction.showOnScreen); // showOnScreen is not user-exposed.
 
     const int expectedId = 1;
     final TestSemantics expectedSemantics = new TestSemantics.root(

packages/flutter_test/lib/src/matchers.dart

@@ -339,6 +339,7 @@ Matcher matchesSemanticsData({
   bool hasPasteAction = false,
   bool hasDidGainAccessibilityFocusAction = false,
   bool hasDidLoseAccessibilityFocusAction = false,
+  bool hasCustomAction = false,
 }) {
   final List<SemanticsFlag> flags = <SemanticsFlag>[];
   if (hasCheckedState)
@@ -405,6 +406,8 @@ Matcher matchesSemanticsData({
     actions.add(SemanticsAction.didGainAccessibilityFocus);
   if (hasDidLoseAccessibilityFocusAction)
     actions.add(SemanticsAction.didLoseAccessibilityFocus);
+  if (hasCustomAction)
+    actions.add(SemanticsAction.customAction);
 
   return new _MatchesSemanticsData(
     label: label,

packages/flutter_test/test/matchers_test.dart

@@ -472,6 +472,7 @@ void main() {
          hasPasteAction: true,
          hasDidGainAccessibilityFocusAction: true,
          hasDidLoseAccessibilityFocusAction: true,
+         hasCustomAction: true,
       ));
     });
   });