Adds a couple more measures to the benchmarking app

apps/benchmark/run_args.cc

Index: apps/benchmark/run_args.cc
diff --git a/apps/benchmark/run_args.cc b/apps/benchmark/run_args.cc
index 8921a96137596001f453a2fb6bead5c47180975f..e74003983f892092f0ff1808b918a12d634fa672 100644
--- a/apps/benchmark/run_args.cc
+++ b/apps/benchmark/run_args.cc
@@ -53,6 +53,16 @@ bool GetMeasurement(const std::string& measurement_spec, Measurement* result) {
       return false;
     *result = Measurement(MeasurementType::AVG_DURATION,
                           EventSpec(parts[2], parts[1]));
+  } else if (parts[0] == "percentile_duration") {
+    if (!CheckMeasurementFormat(parts[0], 4, parts.size()))
+      return false;
+    *result = Measurement(MeasurementType::PERCENTILE_DURATION,
+                          EventSpec(parts[2], parts[1]));
+    if (!base::StringToDouble(parts[3], &result->param)) {
+      LOG(ERROR) << "Expected a number between 0 and 1: " << parts[3] << " in "
+                 << measurement_spec;
+      return false;
+    }
   } else {
     LOG(ERROR) << "Could not recognize the measurement type: " << parts[0];
     return false;