Memory leak fix. Use correct analysis context for annotation constants.

pkg/analyzer/test/generated/all_the_rest_test.dart

Index: pkg/analyzer/test/generated/all_the_rest_test.dart
diff --git a/pkg/analyzer/test/generated/all_the_rest_test.dart b/pkg/analyzer/test/generated/all_the_rest_test.dart
index 9dd08e8ee4c3f6060abf4e720228dbb2c642e480..dc07ef9f3e4c6537207902c7f119147f8126f830 100644
--- a/pkg/analyzer/test/generated/all_the_rest_test.dart
+++ b/pkg/analyzer/test/generated/all_the_rest_test.dart
@@ -886,7 +886,7 @@ class ConstantFinderTest extends EngineTestCase {
   void setUp() {
     super.setUp();
     _typeProvider = new TestTypeProvider();
-    _context = new TestAnalysisContext();
+    _context = new TestAnalysisContext_ConstantFinderTest();
     _source = new TestSource();
   }
 
@@ -9068,6 +9068,16 @@ class StringScannerTest extends AbstractScannerTest {
   }
 }
 
+class TestAnalysisContext_ConstantFinderTest extends TestAnalysisContext {
+  bool invoked = false;
+  TestAnalysisContext_ConstantFinderTest();
+
+  @override
+  InternalAnalysisContext getContextFor(Source source) {
+    return this;
+  }
+}
+
 /**
  * Instances of the class `ToSourceVisitorTest`
  */