Make VariationsService simulate received seeds.

chrome/browser/metrics/variations/variations_seed_store.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 CHROME_BROWSER_METRICS_VARIATIONS_VARIATIONS_SEED_STORE_H_
 #define CHROME_BROWSER_METRICS_VARIATIONS_VARIATIONS_SEED_STORE_H_
 
 #include <string>
 
 #include "base/compiler_specific.h"
@@ skipping 15 matching lines @@
   virtual ~VariationsSeedStore();
 
   // Loads the variations seed data from local state into |seed|. If there is a
   // problem with loading, the pref value is cleared and false is returned. If
   // successful, |seed| will contain the loaded data and true is returned.
   bool LoadSeed(VariationsSeed* seed);
 
   // Stores the given seed data (serialized protobuf data) to local state, along
   // with a base64-encoded digital signature for seed and the date when it was
   // fetched. The |seed_data| will be base64 encoded for storage. If the string
-  // is invalid, the existing prefs are left as is and false is returned.
+  // is invalid, the existing prefs are left as is and false is returned. On
+  // success and if |parsed_seed| is not NULL, |parsed_seed| will be filled
+  // with the de-serialized protobuf decoded from |seed_data|.

[jwd, 2014/04/25 15:29:23]

Can you add a sanity test that |seed_data| has the correct data on success.

[Alexei Svitkine (slow), 2014/04/25 15:43:37]

Done.

   bool StoreSeedData(const std::string& seed_data,
                      const std::string& base64_seed_signature,
-                     const base::Time& date_fetched);
+                     const base::Time& date_fetched,
+                     VariationsSeed* parsed_seed);
 
   // Updates |kVariationsSeedDate| and logs when previous date was from a
   // different day.
   void UpdateSeedDateAndLogDayChange(const base::Time& server_date_fetched);
 
   // Returns the serial number of the last loaded or stored seed.
   const std::string& variations_serial_number() const {
     return variations_serial_number_;
   }
 
@@ skipping 32 matching lines @@
 
   // Cached serial number from the most recently fetched variations seed.
   std::string variations_serial_number_;
 
   DISALLOW_COPY_AND_ASSIGN(VariationsSeedStore);
 };
 
 }  // namespace chrome_variations
 
 #endif  // CHROME_BROWSER_METRICS_VARIATIONS_VARIATIONS_SEED_STORE_H_