Support duration events in `benchmark.mojo`.

apps/benchmark/measurements_unittest.cc

Index: apps/benchmark/measurements_unittest.cc
diff --git a/apps/benchmark/measurements_unittest.cc b/apps/benchmark/measurements_unittest.cc
index 435533b7fb9541d238d2de09dcc25b4c2e035fad..a77651d18e0aba38c2ad24f8a6b186614e8701ec 100644
--- a/apps/benchmark/measurements_unittest.cc
+++ b/apps/benchmark/measurements_unittest.cc
@@ -23,13 +23,11 @@ class MeasurementsTest : public ::testing::Test {
  protected:
   void SetUp() override {
     events_.resize(6);
-    events_[0] = Event("a", "some", Ticks(10), Delta(2));
-    events_[1] = Event("a", "some", Ticks(11), Delta(4));
-    events_[2] = Event("a", "other", Ticks(12), Delta(8));
-    events_[3] = Event("b", "some", Ticks(3), Delta(16));
-    events_[4] = Event("b", "some", Ticks(13), Delta(32));
-    // Event entries carrying metadata have timestamp of 0.
-    events_[5] = Event("something", "__metadata", Ticks(0), Delta(0));
+    events_[0] = Event(EventType::COMPLETE, "a", "some", Ticks(10), Delta(2));
+    events_[1] = Event(EventType::COMPLETE, "a", "some", Ticks(11), Delta(4));
+    events_[2] = Event(EventType::COMPLETE, "a", "other", Ticks(12), Delta(8));
+    events_[3] = Event(EventType::COMPLETE, "b", "some", Ticks(3), Delta(16));
+    events_[4] = Event(EventType::COMPLETE, "b", "some", Ticks(13), Delta(32));
 
     reversed_ = events_;
     reverse(reversed_.begin(), reversed_.end());