Update from chromium 62675d9fb31fb8cedc40f68e78e8445a74f362e7

This is Cr-Commit-Position: refs/heads/master@{#300999}

Review URL: https://codereview.chromium.org/670183003
diff --git a/gin/modules/timer_unittest.cc b/gin/modules/timer_unittest.cc
index 42d7050..705bdc5 100644
--- a/gin/modules/timer_unittest.cc
+++ b/gin/modules/timer_unittest.cc
@@ -37,10 +37,9 @@
   Result() : count_(0) {
   }
 
-  virtual ~Result() {
-  }
+  ~Result() override {}
 
-  virtual ObjectTemplateBuilder GetObjectTemplateBuilder(
+  ObjectTemplateBuilder GetObjectTemplateBuilder(
       v8::Isolate* isolate) override {
     return Wrappable<Result>::GetObjectTemplateBuilder(isolate)
         .SetProperty("count", &Result::count, &Result::set_count)