Add '--finer-grained-invalidation' option to Analysis Server.

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 dd0e0ee7d929d9737cbd2c311d59c9bb0e696d61..6e27b22641ffd3afef3bd7a2abede92d97e42144 100644
--- a/pkg/analyzer/lib/src/context/context.dart
+++ b/pkg/analyzer/lib/src/context/context.dart
@@ -309,6 +309,7 @@ class AnalysisContextImpl implements InternalAnalysisContext {
     this._options.preserveComments = options.preserveComments;
     this._options.strongMode = options.strongMode;
     this._options.trackCacheDependencies = options.trackCacheDependencies;
+    this._options.finerGrainedInvalidation = options.finerGrainedInvalidation;
     if (options is AnalysisOptionsImpl) {
       this._options.strongModeHints = options.strongModeHints;
       this._options.implicitCasts = options.implicitCasts;
@@ -1872,7 +1873,7 @@ class AnalysisContextImpl implements InternalAnalysisContext {
     // We need to invalidate the cache.
     {
       Object delta = null;
-      if (AnalysisEngine.instance.limitInvalidationInTaskModel &&
+      if (analysisOptions.finerGrainedInvalidation &&
           AnalysisEngine.isDartFileName(source.fullName)) {
         // TODO(scheglov) Incorrect implementation in general.
         entry.setState(TOKEN_STREAM, CacheState.FLUSHED);