Add the 'executionDomain' performance tag.

pkg/analysis_server/lib/src/analysis_server.dart

Index: pkg/analysis_server/lib/src/analysis_server.dart
diff --git a/pkg/analysis_server/lib/src/analysis_server.dart b/pkg/analysis_server/lib/src/analysis_server.dart
index 40297678f22555d376fb68795a83013879084ea1..15f57590a62aab1de4214dcdd0a2cf7ec19cab75 100644
--- a/pkg/analysis_server/lib/src/analysis_server.dart
+++ b/pkg/analysis_server/lib/src/analysis_server.dart
@@ -1326,16 +1326,16 @@ class ServerPerformance {
  */
 class ServerPerformanceStatistics {
   /**
-   * The [PerformanceTag] for time spent in
-   * PerformAnalysisOperation._updateIndex.
+   * The [PerformanceTag] for time spent in [ExecutionDomainHandler].
    */
-  static PerformanceTag index = new PerformanceTag('index');
+  static PerformanceTag executionNotifications =
+      new PerformanceTag('executionNotifications');
 
   /**
    * The [PerformanceTag] for time spent in
-   * PerformAnalysisOperation._sendNotices.
+   * PerformAnalysisOperation._updateIndex.
    */
-  static PerformanceTag notices = new PerformanceTag('notices');
+  static PerformanceTag index = new PerformanceTag('index');
 
   /**
    * The [PerformanceTag] for time spent performing a _DartIndexOperation.
@@ -1353,4 +1353,10 @@ class ServerPerformanceStatistics {
    * AnalysisServer.performOperation when the server is idle.
    */
   static PerformanceTag idle = new PerformanceTag('idle');
+
+  /**
+   * The [PerformanceTag] for time spent in
+   * PerformAnalysisOperation._sendNotices.
+   */
+  static PerformanceTag notices = new PerformanceTag('notices');
 }