Modify rappor parameters.

components/rappor/rappor_service_unittest.cc

 // Copyright 2014 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 "components/rappor/rappor_service.h"
 
 #include "components/rappor/byte_vector_utils.h"
 #include "components/rappor/proto/rappor_metric.pb.h"
 #include "components/rappor/rappor_parameters.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace rappor {
 
 class TestRapporService : public RapporService {
  public:
   void GetReports(RapporReports* reports) {
     ExportMetrics(reports);
   }
   void TestRecordSample(const std::string& metric_name,
                         const RapporParameters& parameters,
                         const std::string& sample) {
     RecordSampleInternal(metric_name, parameters, sample);
   }
 };
 
 TEST(RapporServiceTest, RecordAndExportMetrics) {
   const RapporParameters kTestRapporParameters = {
+      1 /* Num cohorts */,
       16 /* Bloom filter size bytes */,
       4 /* Bloom filter hash count */,
       PROBABILITY_75 /* Fake data probability */,
       PROBABILITY_50 /* Fake one probability */,
       PROBABILITY_75 /* One coin probability */,
       PROBABILITY_50 /* Zero coin probability */};
 
   TestRapporService rappor_service;
   rappor_service.SetCohortForTesting(0);
   rappor_service.SetSecretForTesting(
       HmacByteVectorGenerator::GenerateEntropyInput());
 
   rappor_service.TestRecordSample("MyMetric", kTestRapporParameters, "foo");
   rappor_service.TestRecordSample("MyMetric", kTestRapporParameters, "bar");
 
   RapporReports reports;
   rappor_service.GetReports(&reports);
   EXPECT_EQ(1, reports.report_size());
 
   const RapporReports::Report& report = reports.report(0);
   EXPECT_TRUE(report.name_hash());
   EXPECT_EQ(16u, report.bits().size());
 }
 
 }  // namespace rappor