Don't report DeltaResult.KEEP_CONTINUE results as invalidated.

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

Index: pkg/analyzer/test/src/context/cache_test.dart
diff --git a/pkg/analyzer/test/src/context/cache_test.dart b/pkg/analyzer/test/src/context/cache_test.dart
index ab35ffbc1438bab728489a890e207b64b675bd1b..dc09c80707c326ac76c60c6e493bffd20c86dbaf 100644
--- a/pkg/analyzer/test/src/context/cache_test.dart
+++ b/pkg/analyzer/test/src/context/cache_test.dart
@@ -701,6 +701,12 @@ class CacheEntryTest extends AbstractCacheTest {
         unorderedEquals([new TargetedResult(target, result2)]));
     expect(entry.getResultData(result2).dependedOnResults,
         unorderedEquals([new TargetedResult(target, result1)]));
+    // record invalidated results
+    Set<TargetedResult> reportedInvalidatedResults = new Set<TargetedResult>();
+    cache.onResultInvalidated.listen((InvalidatedResult invalidatedResult) {
+      reportedInvalidatedResults.add(new TargetedResult(
+          invalidatedResult.entry.target, invalidatedResult.descriptor));
+    });
     // invalidate result2 with Delta: keep result2, invalidate result3
     entry.setState(result2, CacheState.INVALID,
         delta: new _KeepContinueDelta(target, result2));
@@ -712,6 +718,10 @@ class CacheEntryTest extends AbstractCacheTest {
         unorderedEquals([new TargetedResult(target, result2)]));
     expect(entry.getResultData(result2).dependedOnResults,
         unorderedEquals([new TargetedResult(target, result1)]));
+    // (target, result3) was reported as invalidated
+    // (target, result2) was NOT reported
+    expect(reportedInvalidatedResults,
+        unorderedEquals([new TargetedResult(target, result3)]));
   }
 
   test_setState_valid() {