Conditional AST timing.

pkg/analyzer/lib/src/context/context.dart

Index: pkg/analyzer/lib/src/context/context.dart
diff --git a/pkg/analyzer/lib/src/context/context.dart b/pkg/analyzer/lib/src/context/context.dart
index 9ada7480ececc4966734c8fa214308889127897b..90d5ffc96b8aff72b7f2d1f9b53442209b9a84b0 100644
--- a/pkg/analyzer/lib/src/context/context.dart
+++ b/pkg/analyzer/lib/src/context/context.dart
@@ -288,6 +288,7 @@ class AnalysisContextImpl implements InternalAnalysisContext {
     this._options.enableConditionalDirectives =
         options.enableConditionalDirectives;
     this._options.enableSuperMixins = options.enableSuperMixins;
+    this._options.enableTiming = options.enableTiming;
     this._options.hint = options.hint;
     this._options.incremental = options.incremental;
     this._options.incrementalApi = options.incrementalApi;