Added tests for storing and loading seed data to and from prefs.

chrome/browser/metrics/variations_service.h

Index: chrome/browser/metrics/variations_service.h
diff --git a/chrome/browser/metrics/variations_service.h b/chrome/browser/metrics/variations_service.h
index c4665aab9fa4b8f04cb7b10c3b072f0a27fe55a5..af40833a8ec91d64ce54d9746ba745045ec3a39c 100644
--- a/chrome/browser/metrics/variations_service.h
+++ b/chrome/browser/metrics/variations_service.h
@@ -58,13 +58,15 @@ class VariationsService : public net::URLFetcherDelegate {
   FRIEND_TEST_ALL_PREFIXES(VariationsServiceTest, CheckStudyVersionWildcards);
   FRIEND_TEST_ALL_PREFIXES(VariationsServiceTest, CheckStudyStartDate);
   FRIEND_TEST_ALL_PREFIXES(VariationsServiceTest, IsStudyExpired);
+  FRIEND_TEST_ALL_PREFIXES(VariationsServiceTest, LoadSeed);
+  FRIEND_TEST_ALL_PREFIXES(VariationsServiceTest, StoreSeed);
   FRIEND_TEST_ALL_PREFIXES(VariationsServiceTest, ValidateStudy);
 
   // 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.
-  void StoreSeedData(const std::string& seed_data,
+  // 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);