1 // Copyright 2013 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "base/memory/scoped_ptr.h" 6 #include "base/metrics/field_trial.h" 7 8 namespace { 9 10 // Name of field trial for that sends gzipped UMA protobufs. 11 const char kTrialName[] = "GZippedProtobufs"; 12 13 // Divisor for the gzipped protobufs trial. 14 const int kTrialDivisor = 100; 15 16 // Quotient for the gzipped protobufs trial. 17 const int kTrialQuotient = 50; 18 19 // Name of the group with gzipped protobufs. 20 const char kGroupName[] = "GzippedProtobufsEnabled"; 21 22 // Name of the group with non-gzipped protobufs. 23 const char kControlGroupName[] = "GzippedProtobufsDisabled"; 24 25 // This is set to true if we land in the Finch group that will be sending 26 // protobufs after compressing them. 27 bool should_gzip_protobufs = false; 28 29 } // namespace 30 31 namespace metrics { 32 33 void CreateGzippedProtobufsFieldTrial() { 34 scoped_refptr<base::FieldTrial> gzipped_protobufs_trial = 35 base::FieldTrialList::FactoryGetFieldTrial( 36 kTrialName, 37 kTrialDivisor, 38 kControlGroupName, 39 2013, 40 10, 41 1, 42 base::FieldTrial::ONE_TIME_RANDOMIZED, 43 NULL); 44 int gzipped_protobufs_group = gzipped_protobufs_trial->AppendGroup( 45 kGroupName, 46 kTrialQuotient); 47 should_gzip_protobufs = 48 gzipped_protobufs_trial->group() == gzipped_protobufs_group; 49 } 50 51 bool ShouldGzipProtobufsBeforeUploading() { 52 return should_gzip_protobufs; 53 } 54 55 } // namespace metrics 56
