Add @overrides to (a lot of) analyzer.

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 394f30103715469a2c3bdbe5e45806739b53c2cd..def719f33a6b86f433cc2600274ea11f8b930b00 100644
--- a/pkg/analyzer/lib/src/context/context.dart
+++ b/pkg/analyzer/lib/src/context/context.dart
@@ -72,6 +72,7 @@ class AnalysisContextImpl implements InternalAnalysisContext {
    * A client-provided name used to identify this context, or `null` if the
    * client has not provided a name.
    */
+  @override
   String name;
 
   /**
@@ -129,6 +130,7 @@ class AnalysisContextImpl implements InternalAnalysisContext {
   /**
    * A list of all [WorkManager]s used by this context.
    */
+  @override
   final List<WorkManager> workManagers = <WorkManager>[];
 
   /**
@@ -490,6 +492,7 @@ class AnalysisContextImpl implements InternalAnalysisContext {
   /**
    * Sets the [TypeProvider] for this context.
    */
+  @override
   void set typeProvider(TypeProvider typeProvider) {
     _typeProvider = typeProvider;
   }