Revert 239759 "The comment in base64.h implies that base::Base64..."

trunk/src/chrome/browser/chromeos/settings/device_settings_cache.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/chromeos/settings/device_settings_cache.h"
 
 #include <string>
 
 #include "base/base64.h"
 #include "base/bind.h"
@@ skipping 10 matching lines @@
 namespace device_settings_cache {
 
 void RegisterPrefs(PrefRegistrySimple* registry) {
   registry->RegisterStringPref(prefs::kDeviceSettingsCache, "invalid");
 }
 
 bool Store(const em::PolicyData& policy, PrefService* local_state) {
   if (local_state) {
     std::string policy_string = policy.SerializeAsString();
     std::string encoded;
-    base::Base64Encode(policy_string, &encoded);
+    if (!base::Base64Encode(policy_string, &encoded)) {
+      LOG(ERROR) << "Can't encode policy in base64.";
+      return false;
+    }
     local_state->SetString(prefs::kDeviceSettingsCache, encoded);
     return true;
   }
   return false;
 }
 
 bool Retrieve(em::PolicyData *policy, PrefService* local_state) {
   if (local_state) {
     std::string encoded =
         local_state->GetString(prefs::kDeviceSettingsCache);
     std::string policy_string;
     if (!base::Base64Decode(encoded, &policy_string)) {
       // This is normal and happens on first boot.
       VLOG(1) << "Can't decode policy from base64.";
       return false;
     }
     return policy->ParseFromString(policy_string);
   }
   return false;
 }
 
 }  // namespace device_settings_cache
 
 }  // namespace chromeos