[Cleanup] Remove the obsolete variations_seed pref.

components/variations/service/variations_service_unittest.cc

Index: components/variations/service/variations_service_unittest.cc
diff --git a/components/variations/service/variations_service_unittest.cc b/components/variations/service/variations_service_unittest.cc
index d6293876b093a9680253a870035e89e5b9c3fe6f..bb58d79ca36e4fbdb9bbb4804c3d370df33b0fa5 100644
--- a/components/variations/service/variations_service_unittest.cc
+++ b/components/variations/service/variations_service_unittest.cc
@@ -480,13 +480,15 @@ TEST_F(VariationsServiceTest, SeedNotStoredWhenNonOKStatus) {
   for (size_t i = 0; i < arraysize(non_ok_status_codes); ++i) {
     net::TestURLFetcherFactory factory;
     service.DoActualFetch();
-    EXPECT_TRUE(prefs.FindPreference(prefs::kVariationsSeed)->IsDefaultValue());
+    EXPECT_TRUE(prefs.FindPreference(prefs::kVariationsCompressedSeed)
+                    ->IsDefaultValue());
 
     net::TestURLFetcher* fetcher = factory.GetFetcherByID(0);
     SimulateServerResponse(non_ok_status_codes[i], fetcher);
     service.OnURLFetchComplete(fetcher);
 
-    EXPECT_TRUE(prefs.FindPreference(prefs::kVariationsSeed)->IsDefaultValue());
+    EXPECT_TRUE(prefs.FindPreference(prefs::kVariationsCompressedSeed)
+                    ->IsDefaultValue());
   }
 }