Start making server strong mode clean

pkg/analysis_server/test/timing/timing_framework.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 test.timing;
 
 import 'dart:async';
 import 'dart:io';
 import 'dart:math';
 
@@ skipping 206 matching lines @@
    * Perform any operations that part of a single iteration. It is the execution
    * of this method that will be measured.
    */
   Future perform();
 
   /**
    * Return a future that will complete with a timing result representing the
    * number of milliseconds required to perform the operation the specified
    * number of times.
    */
-  Future<TimingResult> run() {
+  Future<TimingResult> run() async {
     List<int> times = new List<int>();
-    return oneTimeSetUp().then((_) {
-      return _repeat(warmupCount, null).then((_) {
-        return _repeat(timingCount, times).then((_) {
-          return oneTimeTearDown().then((_) {
-            return new Future.value(new TimingResult(times));
-          });
-        });
-      });
-    });
+    await oneTimeSetUp();
+    await _repeat(warmupCount, null);
+    await _repeat(timingCount, times);
+    await oneTimeTearDown();
+    return new Future<TimingResult>.value(new TimingResult(times));
   }
 
   /**
    * Perform any operations that need to be performed before each iteration.
    */
   Future setUp();
 
   /**
    * Convert the given [relativePath] to an absolute path, by interpreting it
    * relative to [sourceDirectory].  On Windows any forward slashes in
@@ skipping 61 matching lines @@
       return new Future.value();
     }
     // Give the server a short time to comply with the shutdown request; if it
     // doesn't exit, then forcibly terminate it.
     sendServerShutdown();
     return server.exitCode.timeout(SHUTDOWN_TIMEOUT, onTimeout: () {
       return server.kill('server failed to exit');
     });
   }
 }