Revert of Supporting study definitions without default groups and end_date filtering.

components/variations/study_filtering.h

 // 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.
 
 #ifndef COMPONENTS_VARIATIONS_STUDY_FILTERING_H_
 #define COMPONENTS_VARIATIONS_STUDY_FILTERING_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 25 matching lines @@
 // Checks whether a study is applicable for the given |locale| per |filter|.
 bool CheckStudyLocale(const Study_Filter& filter, const std::string& locale);
 
 // Checks whether a study is applicable for the given |platform| per |filter|.
 bool CheckStudyPlatform(const Study_Filter& filter, Study_Platform platform);
 
 // Checks whether a study is applicable for the given date/time per |filter|.
 bool CheckStudyStartDate(const Study_Filter& filter,
                          const base::Time& date_time);
 
-// Checks whether a study is applicable for the given date/time per |filter|.
-bool CheckStudyEndDate(const Study_Filter& filter, const base::Time& date_time);
-
 // Checks whether a study is applicable for the given version per |filter|.
 bool CheckStudyVersion(const Study_Filter& filter,
                        const base::Version& version);
 
 // Checks whether a study is applicable for the given |country| per |filter|.
 bool CheckStudyCountry(const Study_Filter& filter, const std::string& country);
 
 // Checks whether |study| is expired using the given date/time.
 bool IsStudyExpired(const Study& study, const base::Time& date_time);
 
@@ skipping 20 matching lines @@
                               Study_Channel channel,
                               Study_FormFactor form_factor,
                               const std::string& hardware_class,
                               const std::string& session_consistency_country,
                               const std::string& permanent_consistency_country,
                               std::vector<ProcessedStudy>* filtered_studies);
 
 }  // namespace variations
 
 #endif  // COMPONENTS_VARIATIONS_STUDY_FILTERING_H_