Add the 'executionDomain' performance tag.

pkg/analysis_server/lib/src/domain_execution.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library domain.execution;
 
 import 'dart:async';
 import 'dart:collection';
 
 import 'package:analysis_server/src/analysis_server.dart';
 import 'package:analysis_server/src/constants.dart';
 import 'package:analysis_server/src/protocol.dart';
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/source.dart';
+import 'package:analyzer/src/generated/utilities_general.dart';
 
 /**
  * Instances of the class [ExecutionDomainHandler] implement a [RequestHandler]
  * that handles requests in the `execution` domain.
  */
 class ExecutionDomainHandler implements RequestHandler {
   /**
    * The analysis server that is using this handler to process requests.
    */
   final AnalysisServer server;
@@ skipping 125 matching lines @@
     } else {
       if (onFileAnalyzed != null) {
         onFileAnalyzed.cancel();
         onFileAnalyzed = null;
       }
     }
     return new ExecutionSetSubscriptionsResult().toResponse(request.id);
   }
 
   void _fileAnalyzed(ChangeNotice notice) {
-    Source source = notice.source;
-    String filePath = source.fullName;
-    if (!_isInAnalysisRoot(filePath)) {
-      return;
-    }
-    AnalysisContext context = server.getAnalysisContext(filePath);
-    if (AnalysisEngine.isDartFileName(filePath)) {
-      ExecutableKind kind = ExecutableKind.NOT_EXECUTABLE;
-      if (context.isClientLibrary(source)) {
-        kind = ExecutableKind.CLIENT;
-        if (context.isServerLibrary(source)) {
-          kind = ExecutableKind.EITHER;
+    PerformanceTag prevTag =
+        ServerPerformanceStatistics.executionDomain.makeCurrent();
+    try {
+      Source source = notice.source;
+      String filePath = source.fullName;
+      if (!_isInAnalysisRoot(filePath)) {
+        return;
+      }
+      AnalysisContext context = server.getAnalysisContext(filePath);
+      if (AnalysisEngine.isDartFileName(filePath)) {
+        ExecutableKind kind = ExecutableKind.NOT_EXECUTABLE;
+        if (context.isClientLibrary(source)) {
+          kind = ExecutableKind.CLIENT;
+          if (context.isServerLibrary(source)) {
+            kind = ExecutableKind.EITHER;
+          }
+        } else if (context.isServerLibrary(source)) {
+          kind = ExecutableKind.SERVER;
         }
-      } else if (context.isServerLibrary(source)) {
-        kind = ExecutableKind.SERVER;
+        server.sendNotification(
+            new ExecutionLaunchDataParams(filePath, kind: kind).toNotification());
+      } else if (AnalysisEngine.isHtmlFileName(filePath)) {
+        List<Source> libraries = context.getLibrariesReferencedFromHtml(source);
+        server.sendNotification(
+            new ExecutionLaunchDataParams(
+                filePath,
+                referencedFiles: _getFullNames(libraries)).toNotification());
       }
-      server.sendNotification(
-          new ExecutionLaunchDataParams(filePath, kind: kind).toNotification());
-    } else if (AnalysisEngine.isHtmlFileName(filePath)) {
-      List<Source> libraries = context.getLibrariesReferencedFromHtml(source);
-      server.sendNotification(
-          new ExecutionLaunchDataParams(
-              filePath,
-              referencedFiles: _getFullNames(libraries)).toNotification());
+    } finally {
+      prevTag.makeCurrent();
     }
   }
 
   /**
    * Return `true` if the given [filePath] represents a file that is in an
    * analysis root.
    */
   bool _isInAnalysisRoot(String filePath) =>
       server.contextDirectoryManager.isInAnalysisRoot(filePath);
 
@@ skipping 39 matching lines @@
     if (_isInAnalysisRoot(filePath)) {
       server.sendNotification(
           new ExecutionLaunchDataParams(filePath, kind: kind).toNotification());
     }
   }
 
   static List<String> _getFullNames(List<Source> sources) {
     return sources.map((Source source) => source.fullName).toList();
   }
 }