When in-body incremantal resolution is performed, it should update REFERENCED_NAMES.

pkg/analyzer/test/src/context/context_test.dart

Index: pkg/analyzer/test/src/context/context_test.dart
diff --git a/pkg/analyzer/test/src/context/context_test.dart b/pkg/analyzer/test/src/context/context_test.dart
index 583bc1f10ff3e41ea550677432451d9a86994228..b01e2b818c21017e48f68a48cd3b813a8b379d8b 100644
--- a/pkg/analyzer/test/src/context/context_test.dart
+++ b/pkg/analyzer/test/src/context/context_test.dart
@@ -3103,6 +3103,53 @@ class C {}
     expect(context.getErrors(b).errors, hasLength(1));
   }
 
+  void test_sequence_inBodyChange_deltaChange() {

[Brian Wilkerson, 2016/07/07 20:58:41]

This will test that the newly referenced name gets added. Do we have tests that
a newly no-longer-referenced identifier will be removed correctly?

[scheglov, 2016/07/07 21:02:45]

Good idea, thank you.
I've added a new test for this case.

+    Source a = addSource(
+        '/a.dart',
+        r'''
+class A {
+}
+''');
+    Source b = addSource(
+        '/b.dart',
+        r'''
+import 'a.dart';
+main(A a) {
+}
+''');
+    _performPendingAnalysisTasks();
+    expect(context.getErrors(b).errors, hasLength(0));
+    // Update b.dart: in-body incremental change
+    //   Should update referenced names.
+    context.setContents(
+        b,
+        r'''
+import 'a.dart';
+main(A a) {
+  a.foo;
+}
+''');
+    _performPendingAnalysisTasks();
+    expect(context.getErrors(b).errors, hasLength(1));
+    // Update a.dart: add A.foo
+    //   b.dart is invalid, because it references 'foo'.
+    context.setContents(
+        a,
+        r'''
+class A {
+  int foo;
+}
+''');
+    _assertValidForChangedLibrary(a);
+    _assertInvalid(a, LIBRARY_ERRORS_READY);
+    _assertValidForDependentLibrary(b);
+    _assertInvalid(b, LIBRARY_ERRORS_READY);
+    _assertInvalidUnits(b, RESOLVED_UNIT4);
+    // No errors after analysis.
+    _performPendingAnalysisTasks();
+    expect(context.getErrors(b).errors, hasLength(0));
+  }
+
   void test_sequence_noChange_thenChange() {
     Source a = addSource(
         '/a.dart',