Take inheritance into account when computing the elements accessible by mirrors.

pkg/dart2js_incremental/lib/caching_compiler.dart

Index: pkg/dart2js_incremental/lib/caching_compiler.dart
diff --git a/pkg/dart2js_incremental/lib/caching_compiler.dart b/pkg/dart2js_incremental/lib/caching_compiler.dart
index 8c4f5bd073072e3487c41cb40ae25634f3775ac4..b7d9fff9f3816136c87a6897335fc9b493ebd078 100644
--- a/pkg/dart2js_incremental/lib/caching_compiler.dart
+++ b/pkg/dart2js_incremental/lib/caching_compiler.dart
@@ -38,7 +38,7 @@ Compiler reuseCompiler(
       !compiler.hasIncrementalSupport ||
       compiler.hasCrashed ||
       compiler.compilerWasCancelled ||
-      compiler.enqueuer.resolution.hasEnqueuedEverything ||
+      compiler.enqueuer.resolution.hasEnqueuedReflectiveElements ||
       compiler.deferredLoadTask.splitProgram) {
     if (compiler != null && compiler.hasIncrementalSupport) {
       print('***FLUSH***');
@@ -46,7 +46,7 @@ Compiler reuseCompiler(
         print('Unable to reuse compiler due to crash.');
       } else if (compiler.compilerWasCancelled) {
         print('Unable to reuse compiler due to cancel.');
-      } else if (compiler.enqueuer.resolution.hasEnqueuedEverything) {
+      } else if (compiler.enqueuer.resolution.hasEnqueuedReflectiveElements) {
         print('Unable to reuse compiler due to dart:mirrors.');
       } else if (compiler.deferredLoadTask.splitProgram) {
         print('Unable to reuse compiler due to deferred loading.');
@@ -68,10 +68,10 @@ Compiler reuseCompiler(
         ..provider = inputProvider
         ..handler = diagnosticHandler
         ..enqueuer.resolution.queueIsClosed = false
-        ..enqueuer.resolution.hasEnqueuedEverything = false
+        ..enqueuer.resolution.hasEnqueuedReflectiveElements = false
         ..enqueuer.resolution.hasEnqueuedReflectiveStaticFields = false
         ..enqueuer.codegen.queueIsClosed = false
-        ..enqueuer.codegen.hasEnqueuedEverything = false
+        ..enqueuer.codegen.hasEnqueuedReflectiveElements = false
         ..enqueuer.codegen.hasEnqueuedReflectiveStaticFields = false
         ..assembledCode = null
         ..compilationFailed = false;