Add a switch for faking channels for Variations filtering.

chrome/browser/metrics/variations/variations_service.h

 // Copyright (c) 2012 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 CHROME_BROWSER_METRICS_VARIATIONS_VARIATIONS_SERVICE_H_
 #define CHROME_BROWSER_METRICS_VARIATIONS_VARIATIONS_SERVICE_H_
 
 #include <string>
 
 #include "base/compiler_specific.h"
@@ skipping 75 matching lines @@
   virtual void OnResourceRequestsAllowed() OVERRIDE;
 
   // Store the given seed data to the given local prefs. Note that |seed_data|
   // is assumed to be the raw serialized protobuf data stored in a string. It
   // will be Base64Encoded for storage. If the string is invalid or the encoding
   // fails, the |local_prefs| is left as is and the function returns false.
   bool StoreSeedData(const std::string& seed_data,
                      const base::Time& seed_date,
                      PrefService* local_prefs);
 
+  // Wrapper around channel checking, used to enable channel mocking for
+  // testing. If the current browser channel is not UNKNOWN, this will return
+  // that channel value. Otherwise, if the fake channel flag is provided, this
+  // will return the fake channel. Failing that, this will return the UNKNOWN
+  // channel.
+  static chrome::VersionInfo::Channel GetChannelForVariations();
+
   // Returns whether |study| should be disabled according to its restriction
   // parameters. Uses |version_info| for min / max version checks and
   // |reference_date| for the start date check.
   static bool ShouldAddStudy(const Study& study,
                              const chrome::VersionInfo& version_info,
                              const base::Time& reference_date);
 
   // Checks whether a study is applicable for the given |channel| per |filter|.
   static bool CheckStudyChannel(const Study_Filter& filter,
                                 chrome::VersionInfo::Channel channel);
@@ skipping 58 matching lines @@
   scoped_ptr<ResourceRequestAllowedNotifier> resource_request_allowed_notifier_;
 
   // The start time of the last seed request. This is used to measure the
   // latency of seed requests. Initially zero.
   base::TimeTicks last_request_started_time_;
 };
 
 }  // namespace chrome_variations
 
 #endif  // CHROME_BROWSER_METRICS_VARIATIONS_VARIATIONS_SERVICE_H_