Add variations filtering for is_low_end_device.

components/variations/study_filtering.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/variations/study_filtering.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <set>
@@ skipping 98 matching lines @@
   if (filter.platform_size() == 0)
     return true;
 
   for (int i = 0; i < filter.platform_size(); ++i) {
     if (filter.platform(i) == platform)
       return true;
   }
   return false;
 }
 
+bool CheckStudyLowEndDevice(const Study::Filter& filter,
+                            bool is_low_end_device) {
+  return !filter.has_is_low_end_device() ||
+         filter.is_low_end_device() == is_low_end_device;
+}
+
 bool CheckStudyStartDate(const Study::Filter& filter,
                          const base::Time& date_time) {
   if (filter.has_start_date()) {
     const base::Time start_date =
         ConvertStudyDateToBaseTime(filter.start_date());
     return date_time >= start_date;
   }
 
   return true;
 }
@@ skipping 109 matching lines @@
       DVLOG(1) << "Filtered out study " << study.name() << " due to end date.";
       return false;
     }
 
     if (!CheckStudyHardwareClass(study.filter(), client_state.hardware_class)) {
       DVLOG(1) << "Filtered out study " << study.name() <<
                   " due to hardware_class.";
       return false;
     }
 
+    if (!CheckStudyLowEndDevice(study.filter(),
+                                client_state.is_low_end_device)) {
+      DVLOG(1) << "Filtered out study " << study.name()
+               << " due to is_low_end_device.";
+      return false;
+    }
+
     const std::string& country = GetClientCountryForStudy(study, client_state);
     if (!CheckStudyCountry(study.filter(), country)) {
       DVLOG(1) << "Filtered out study " << study.name() << " due to country.";
       return false;
     }
   }
 
   DVLOG(1) << "Kept study " << study.name() << ".";
   return true;
 }
@@ skipping 27 matching lines @@
 
   for (size_t i = 0; i < expired_studies.size(); ++i) {
     if (!base::ContainsKey(created_studies, expired_studies[i]->name())) {
       ProcessedStudy::ValidateAndAppendStudy(expired_studies[i], true,
                                              filtered_studies);
     }
   }
 }
 
 }  // namespace variations