Add access to FutureOr in TypeProviders (and add implementation in mock sdks)

pkg/analyzer/lib/src/summary/link.dart

Index: pkg/analyzer/lib/src/summary/link.dart
diff --git a/pkg/analyzer/lib/src/summary/link.dart b/pkg/analyzer/lib/src/summary/link.dart
index 1e375c9e82d242db122dcf1986647a4fdc824461..3bd5ba3cca2ba55fc69b7fd259a5cf0efcbd7a21 100644
--- a/pkg/analyzer/lib/src/summary/link.dart
+++ b/pkg/analyzer/lib/src/summary/link.dart
@@ -4656,6 +4656,7 @@ class TypeProviderForLink extends TypeProviderBase {
   InterfaceType _functionType;
   InterfaceType _futureDynamicType;
   InterfaceType _futureNullType;
+  InterfaceType _futureOrType;
   InterfaceType _futureType;
   InterfaceType _intType;
   InterfaceType _iterableDynamicType;
@@ -4705,6 +4706,10 @@ class TypeProviderForLink extends TypeProviderBase {
       _futureNullType ??= futureType.instantiate(<DartType>[nullType]);
 
   @override
+  InterfaceType get futureOrType =>
+      _futureOrType ??= _buildInterfaceType(_linker.asyncLibrary, 'Future');

[scheglov, 2016/12/15 20:47:58]

'FutureOr'?

[Brian Wilkerson, 2016/12/15 20:54:39]

Good catch. Done.

+
+  @override
   InterfaceType get futureType =>
       _futureType ??= _buildInterfaceType(_linker.asyncLibrary, 'Future');