[Cleanup] Remove the obsolete variations_seed pref.

chrome/browser/chrome_browser_main.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 "chrome/browser/chrome_browser_main.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <set>
@@ skipping 1129 matching lines @@
     }
 
     // TODO(macourteau): refactor preferences that are copied from
     // master_preferences into local_state, as a "local_state" section in
     // master preferences. If possible, a generic solution would be preferred
     // over a copy one-by-one of specific preferences. Also see related TODO
     // in first_run.h.
 
     // Store the initial VariationsService seed in local state, if it exists
     // in master prefs.
-    if (!master_prefs_->variations_seed.empty() ||
-        !master_prefs_->compressed_variations_seed.empty()) {
-      if (!master_prefs_->variations_seed.empty()) {
-        local_state_->SetString(variations::prefs::kVariationsSeed,
-                                master_prefs_->variations_seed);
-      }
-      if (!master_prefs_->compressed_variations_seed.empty()) {
-        local_state_->SetString(variations::prefs::kVariationsCompressedSeed,
-                                master_prefs_->compressed_variations_seed);
-      }
+    if (!master_prefs_->compressed_variations_seed.empty()) {
+      local_state_->SetString(variations::prefs::kVariationsCompressedSeed,
+                              master_prefs_->compressed_variations_seed);
       if (!master_prefs_->variations_seed_signature.empty()) {
         local_state_->SetString(variations::prefs::kVariationsSeedSignature,
                                 master_prefs_->variations_seed_signature);
       }
       // Set the variation seed date to the current system time. If the user's
       // clock is incorrect, this may cause some field trial expiry checks to
       // not do the right thing until the next seed update from the server,
       // when this value will be updated.
       local_state_->SetInt64(variations::prefs::kVariationsSeedDate,
                              base::Time::Now().ToInternalValue());
@@ skipping 897 matching lines @@
   chromeos::CrosSettings::Shutdown();
 #endif  // defined(OS_CHROMEOS)
 #endif  // defined(OS_ANDROID)
 }
 
 // Public members:
 
 void ChromeBrowserMainParts::AddParts(ChromeBrowserMainExtraParts* parts) {
   chrome_extra_parts_.push_back(parts);
 }