Hook up full list literal type inference logic.

pkg/front_end/lib/src/base/instrumentation.dart

Index: pkg/front_end/lib/src/base/instrumentation.dart
diff --git a/pkg/front_end/lib/src/base/instrumentation.dart b/pkg/front_end/lib/src/base/instrumentation.dart
index ba78dcd4b50ea499c9ace74b71d188b04e2f518a..d80fff493ec715028ee6b27d1cbd8cc3acf25d5e 100644
--- a/pkg/front_end/lib/src/base/instrumentation.dart
+++ b/pkg/front_end/lib/src/base/instrumentation.dart
@@ -45,6 +45,18 @@ class InstrumentationValueForType extends InstrumentationValue {
   }
 }
 
+/// Instance of [InstrumentationValue] describing a list of [DartType]s.
+class InstrumentationValueForTypeArgs extends InstrumentationValue {
+  final List<DartType> types;
+
+  InstrumentationValueForTypeArgs(this.types);
+
+  @override
+  String toString() => types
+      .map((type) => new InstrumentationValueForType(type).toString())
+      .join(', ');
+}
+
 /// Instance of [InstrumentationValue] which only matches the given literal
 /// string.
 class InstrumentationValueLiteral extends InstrumentationValue {