Support duration events in `benchmark.mojo`.

apps/benchmark/run_args.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "apps/benchmark/run_args.h"
 
 #include <algorithm>
 
 #include "base/command_line.h"
 #include "base/logging.h"
@@ skipping 16 matching lines @@
 
   if (parts[0] == "time_until") {
     result->type = MeasurementType::TIME_UNTIL;
   } else if (parts[0] == "avg_duration") {
     result->type = MeasurementType::AVG_DURATION;
   } else {
     LOG(ERROR) << "Could not recognize the measurement type: " << parts[0];
     return false;
   }
 
-  result->target_event.category = parts[1];
+  result->target_event.categories = parts[1];
   result->target_event.name = parts[2];
   result->spec = measurement_spec;
   return true;
 }
 
 }  // namespace
 
 RunArgs::RunArgs() {}
 
 RunArgs::~RunArgs() {}
@@ skipping 27 matching lines @@
     if (!GetMeasurement(measurement_spec, &measurement)) {
       return false;
     }
     result->measurements.push_back(measurement);
   }
 
   return true;
 }
 
 }  // namespace benchmark