Fix an issue calculating analysis server cpu usage.

pkg/analysis_server/test/src/utilities/profiling_test.dart

Index: pkg/analysis_server/test/src/utilities/profiling_test.dart
diff --git a/pkg/analysis_server/test/src/utilities/profiling_test.dart b/pkg/analysis_server/test/src/utilities/profiling_test.dart
index 4151af7fe4c4e88a34f5718f39e4e90345d2786d..4906c4bc7b7acfec8caac0d48c59d53baaa14012 100644
--- a/pkg/analysis_server/test/src/utilities/profiling_test.dart
+++ b/pkg/analysis_server/test/src/utilities/profiling_test.dart
@@ -18,14 +18,13 @@ main() {
       expect(ProcessProfiler.getProfilerForPlatform(), isNotNull);
     });
 
-    // TODO: https://github.com/dart-lang/sdk/issues/29815
-//    test('getProcessUsage', () async {
-//      ProcessProfiler profiler = ProcessProfiler.getProfilerForPlatform();
-//      UsageInfo info = await profiler.getProcessUsage(pid);
-//
-//      expect(info, isNotNull);
-//      expect(info.cpuPercentage, greaterThanOrEqualTo(0.0));
-//      expect(info.memoryKB, greaterThanOrEqualTo(0));
-//    });
+    test('getProcessUsage', () async {
+      ProcessProfiler profiler = ProcessProfiler.getProfilerForPlatform();
+      UsageInfo info = await profiler.getProcessUsage(pid);
+
+      expect(info, isNotNull);
+      expect(info.cpuPercentage, greaterThanOrEqualTo(0.0));
+      expect(info.memoryKB, greaterThanOrEqualTo(0));
+    });
   });
 }