Change dependency walker's Node.dependencies to a static getter.

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 c6ee957c478d260a803b329ef2d75f3c7a70824d..0d8fa92cdb30bc0f9ee3eb3f15bffa5d3e36997f 100644
--- a/pkg/analyzer/lib/src/summary/link.dart
+++ b/pkg/analyzer/lib/src/summary/link.dart
@@ -3422,7 +3422,7 @@ class LibraryDependencyWalker extends DependencyWalker<LibraryNode> {
   void evaluateScc(List<LibraryNode> scc) {
     Set<LibraryCycleForLink> dependentCycles = new Set<LibraryCycleForLink>();
     for (LibraryNode node in scc) {
-      for (LibraryNode dependency in node.dependencies) {
+      for (LibraryNode dependency in Node.getDependencies(node)) {
         if (dependency.isEvaluated) {
           dependentCycles.add(dependency._libraryCycle);
         }