Include 'invokeMethodRef' reference as a linking dependency.

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 7d793315ee2f1dfccbbb04d2c5e3347f3ccaf5eb..01c196096a89c81ed6848698b1169b2f30f0ec57 100644
--- a/pkg/analyzer/lib/src/summary/link.dart
+++ b/pkg/analyzer/lib/src/summary/link.dart
@@ -4887,7 +4887,12 @@ class TypeInferenceNode extends Node<TypeInferenceNode> {
         case UnlinkedExprOperation.invokeMethodRef:
           // TODO(paulberry): if this reference refers to a variable, should it

[Paul Berry, 2017/04/04 21:31:48]

We can get rid of this TODO now.

           // be considered a type inference dependency?
-          refPtr++;
+          EntityRef ref = unlinkedConst.references[refPtr++];
+          TypeInferenceNode dependency =
+              compilationUnit.resolveRef(ref.reference).asTypeInferenceNode;
+          if (dependency != null) {
+            dependencies.add(dependency);
+          }
           intPtr += 2;
           int numTypeArguments = unlinkedConst.ints[intPtr++];
           refPtr += numTypeArguments;