[Cleanup] Remove the obsolete variations_seed pref.

components/variations/service/variations_service_unittest.cc

 // 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.
 
 #include "components/variations/service/variations_service.h"
 
 #include <stddef.h>
 
 #include <memory>
 #include <utility>
@@ skipping 462 matching lines @@
   TestingPrefServiceSimple prefs;
   VariationsService::RegisterPrefs(prefs.registry());
 
   TestVariationsService service(
       base::MakeUnique<web_resource::TestRequestAllowedNotifier>(&prefs),
       &prefs);
   service.set_intercepts_fetch(false);
   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());
   }
 }
 
 TEST_F(VariationsServiceTest, RequestGzipCompressedSeed) {
   TestingPrefServiceSimple prefs;
   VariationsService::RegisterPrefs(prefs.registry());
   net::TestURLFetcherFactory factory;
 
   TestVariationsService service(
       base::MakeUnique<web_resource::TestRequestAllowedNotifier>(&prefs),
@@ skipping 278 matching lines @@
     }
     const base::ListValue* pref_value =
         prefs.GetList(prefs::kVariationsPermanentConsistencyCountry);
     EXPECT_EQ(ListValueToString(expected_list_value),
               ListValueToString(*pref_value))
         << test.pref_value_before << ", " << test.country_code_override;
   }
 }
 
 }  // namespace variations