Allow variation id with forcing flag for special setup & unit tests.

components/variations/variations_seed_processor.h

 // Copyright 2013 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_VARIATIONS_SEED_PROCESSOR_H_
 #define COMPONENTS_VARIATIONS_VARIATIONS_SEED_PROCESSOR_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 18 matching lines @@
   // Creates field trials from the specified variations |seed|, based on the
   // specified configuration (locale, current date, version and channel).
   void CreateTrialsFromSeed(const VariationsSeed& seed,
                             const std::string& locale,
                             const base::Time& reference_date,
                             const base::Version& version,
                             Study_Channel channel,
                             Study_FormFactor form_factor);
 
  private:
+  FRIEND_TEST_ALL_PREFIXES(VariationsSeedProcessorTest,
+                           AllowForceGroupAndVariationId);
+  FRIEND_TEST_ALL_PREFIXES(VariationsSeedProcessorTest,
+                           AllowVariationIdWithForcingFlag);
   FRIEND_TEST_ALL_PREFIXES(VariationsSeedProcessorTest, CheckStudyChannel);
   FRIEND_TEST_ALL_PREFIXES(VariationsSeedProcessorTest, CheckStudyFormFactor);
   FRIEND_TEST_ALL_PREFIXES(VariationsSeedProcessorTest, CheckStudyLocale);
   FRIEND_TEST_ALL_PREFIXES(VariationsSeedProcessorTest, CheckStudyPlatform);
   FRIEND_TEST_ALL_PREFIXES(VariationsSeedProcessorTest, CheckStudyStartDate);
   FRIEND_TEST_ALL_PREFIXES(VariationsSeedProcessorTest, CheckStudyVersion);
   FRIEND_TEST_ALL_PREFIXES(VariationsSeedProcessorTest,
                            FilterAndValidateStudies);
+  FRIEND_TEST_ALL_PREFIXES(VariationsSeedProcessorTest,
+                           ForbidForceGroupWithVariationId);
   FRIEND_TEST_ALL_PREFIXES(VariationsSeedProcessorTest, ForceGroupWithFlag1);
   FRIEND_TEST_ALL_PREFIXES(VariationsSeedProcessorTest, ForceGroupWithFlag2);
   FRIEND_TEST_ALL_PREFIXES(VariationsSeedProcessorTest,
                            ForceGroup_ChooseFirstGroupWithFlag);
   FRIEND_TEST_ALL_PREFIXES(VariationsSeedProcessorTest,
                            ForceGroup_DontChooseGroupWithFlag);
   FRIEND_TEST_ALL_PREFIXES(VariationsSeedProcessorTest, IsStudyExpired);
   FRIEND_TEST_ALL_PREFIXES(VariationsSeedProcessorTest, ValidateStudy);
   FRIEND_TEST_ALL_PREFIXES(VariationsSeedProcessorTest, VariationParams);
   FRIEND_TEST_ALL_PREFIXES(VariationsSeedProcessorTest,
                            VariationParamsWithForcingFlag);
 
+  // Check if the |study| is only associated with platform Android/iOS and
+  // channel dev/canary. If so, forcing flag and variation id can both be set.
+  // (Otherwise, forcing_flag and variation_id are mutually exclusive.)
+  bool AllowVariationIdWithForcingFlag(const Study& study);
+
   // Filters the list of studies in |seed| and validates and pre-processes them,
   // adding any kept studies to |filtered_studies| list. Ensures that the
   // resulting list will not have more than one study with the same name.
   void FilterAndValidateStudies(const VariationsSeed& seed,
                                 const std::string& locale,
                                 const base::Time& reference_date,
                                 const base::Version& version,
                                 Study_Channel channel,
                                 Study_FormFactor form_factor,
                                 std::vector<ProcessedStudy>* filtered_studies);
@@ skipping 48 matching lines @@
   bool ValidateStudyAndComputeTotalProbability(
       const Study& study,
       base::FieldTrial::Probability* total_probability);
 
   DISALLOW_COPY_AND_ASSIGN(VariationsSeedProcessor);
 };
 
 }  // namespace chrome_variations
 
 #endif  // COMPONENTS_VARIATIONS_VARIATIONS_SEED_PROCESSOR_H_