Remove old index and search implementations.

pkg/analysis_server/lib/src/plugin/server_plugin.dart

Index: pkg/analysis_server/lib/src/plugin/server_plugin.dart
diff --git a/pkg/analysis_server/lib/src/plugin/server_plugin.dart b/pkg/analysis_server/lib/src/plugin/server_plugin.dart
index b35d5bd546bc149b7013f42b636a8891805905a8..91ecb32d2b5ce8ebaa2433d92b06ce3e495e5745 100644
--- a/pkg/analysis_server/lib/src/plugin/server_plugin.dart
+++ b/pkg/analysis_server/lib/src/plugin/server_plugin.dart
@@ -25,12 +25,9 @@ import 'package:analysis_server/src/domains/analysis/navigation_dart.dart';
 import 'package:analysis_server/src/domains/analysis/occurrences_dart.dart';
 import 'package:analysis_server/src/edit/edit_domain.dart';
 import 'package:analysis_server/src/provisional/completion/completion_core.dart';
-import 'package:analysis_server/src/provisional/index/index.dart';
-import 'package:analysis_server/src/provisional/index/index_core.dart';
 import 'package:analysis_server/src/search/search_domain.dart';
 import 'package:analysis_server/src/services/correction/assist_internal.dart';
 import 'package:analysis_server/src/services/correction/fix_internal.dart';
-import 'package:analysis_server/src/services/index/index_contributor.dart';
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:plugin/plugin.dart';
 
@@ -138,11 +135,6 @@ class ServerPlugin implements Plugin {
   ExtensionPoint fixContributorExtensionPoint;
 
   /**
-   * The extension point that allows plugins to register index contributors.
-   */
-  ExtensionPoint indexContributorExtensionPoint;

[Brian Wilkerson, 2016/03/14 18:57:32]

Why are we getting rid of this? I thought we had plugins that needed this
functionality.

If we don't have plugins that need it, can we restore it later if we need to, or
does the new architecture preclude allowing contributions?

[scheglov, 2016/03/14 19:18:38]

  AFAIK we don't have such plugins yet.
  It was work in progress to support Angular2 plugins, but at the end it has
never been implemented.
We will able to restore it later.
_ContextIndex can be taught to index other kinds of objects than
CompilationUnits and provide references to Dart elements in these objects.

-
-  /**
    * The extension point that allows plugins to register navigation
    * contributors.
    */
@@ -200,13 +192,6 @@ class ServerPlugin implements Plugin {
       fixContributorExtensionPoint.extensions;
 
   /**
-   * Return a list containing all of the index contributors that were
-   * contributed.
-   */
-  List<IndexContributor> get indexContributors =>
-      indexContributorExtensionPoint.extensions;
-
-  /**
    * Return a list containing all of the navigation contributors that were
    * contributed.
    */
@@ -261,8 +246,6 @@ class ServerPlugin implements Plugin {
         DOMAIN_EXTENSION_POINT, _validateDomainExtension);
     fixContributorExtensionPoint = registerExtensionPoint(
         FIX_CONTRIBUTOR_EXTENSION_POINT, _validateFixContributorExtension);
-    indexContributorExtensionPoint = registerExtensionPoint(
-        INDEX_CONTRIBUTOR_EXTENSION_POINT, _validateIndexContributorExtension);
     navigationContributorExtensionPoint = registerExtensionPoint(
         NAVIGATION_CONTRIBUTOR_EXTENSION_POINT,
         _validateNavigationContributorExtension);
@@ -323,11 +306,6 @@ class ServerPlugin implements Plugin {
     //
     registerExtension(
         FIX_CONTRIBUTOR_EXTENSION_POINT_ID, new DefaultFixContributor());
-    //
-    // Register index contributors.
-    //
-    registerExtension(
-        INDEX_CONTRIBUTOR_EXTENSION_POINT_ID, new DartIndexContributor());
   }
 
   /**
@@ -403,17 +381,6 @@ class ServerPlugin implements Plugin {
 
   /**
    * Validate the given extension by throwing an [ExtensionError] if it is not a
-   * valid index contributor.
-   */
-  void _validateIndexContributorExtension(Object extension) {
-    if (extension is! IndexContributor) {
-      String id = indexContributorExtensionPoint.uniqueIdentifier;
-      throw new ExtensionError('Extensions to $id must be an IndexContributor');
-    }
-  }
-
-  /**
-   * Validate the given extension by throwing an [ExtensionError] if it is not a
    * valid navigation contributor.
    */
   void _validateNavigationContributorExtension(Object extension) {