Set MethodInvocation.interfaceTarget during type inference.

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 d80fff493ec715028ee6b27d1cbd8cc3acf25d5e..50e99c40b29e1ce00b5cd7f7f223d669c696f0aa 100644
--- a/pkg/front_end/lib/src/base/instrumentation.dart
+++ b/pkg/front_end/lib/src/base/instrumentation.dart
@@ -26,6 +26,20 @@ abstract class InstrumentationValue {
   bool matches(String description) => description == toString();
 }
 
+/// Instance of [InstrumentationValue] describing a [Procedure].
+class InstrumentationValueForProcedure extends InstrumentationValue {
+  final Procedure procedure;
+
+  InstrumentationValueForProcedure(this.procedure);
+
+  @override
+  String toString() => procedure
+      .toString()
+      .replaceAll('dart.core::', '')
+      .replaceAll('dart.async::', '')
+      .replaceAll('test::', '');
+}
+
 /// Instance of [InstrumentationValue] describing a [DartType].
 class InstrumentationValueForType extends InstrumentationValue {
   final DartType type;