Initial support for an explicit plugin list

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 9285f76ed75767e6cc0e60d45ff589ec53293893..73e8165626a2c7a0632adfa7c7f775b3ed34761c 100644
--- a/pkg/analyzer/lib/src/context/context.dart
+++ b/pkg/analyzer/lib/src/context/context.dart
@@ -270,6 +270,8 @@ class AnalysisContextImpl implements InternalAnalysisContext {
             options.generateImplicitErrors ||
         this._options.generateSdkErrors != options.generateSdkErrors ||
         this._options.dart2jsHint != options.dart2jsHint ||
+        _notEqual(
+            this._options.enabledPluginNames, options.enabledPluginNames) ||
         _notEqual(this._options.errorProcessors, options.errorProcessors) ||
         _notEqual(this._options.excludePatterns, options.excludePatterns) ||
         (this._options.hint && !options.hint) ||
@@ -311,6 +313,7 @@ class AnalysisContextImpl implements InternalAnalysisContext {
         options.enableLazyAssignmentOperators;
     this._options.enableSuperMixins = options.enableSuperMixins;
     this._options.enableTiming = options.enableTiming;
+    this._options.enabledPluginNames = options.enabledPluginNames;
     this._options.errorProcessors = options.errorProcessors;
     this._options.excludePatterns = options.excludePatterns;
     this._options.hint = options.hint;