Cleanup: Better constify some strings in chrome/browser/{chromeos,extensions}.

chrome/browser/chromeos/policy/device_cloud_policy_manager_chromeos.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/policy/device_cloud_policy_manager_chromeos.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/port.h"
@@ skipping 37 matching lines @@
 // Product_S/N is still special-cased due to inconsistencies with serial
 // numbers on Lumpy devices: On these devices, serial_number is identical to
 // Product_S/N with an appended checksum. Unfortunately, the sticker on the
 // packaging doesn't include that checksum either (the sticker on the device
 // does though!). The former sticker is the source of the serial number used by
 // device management service, so we prefer Product_S/N over serial number to
 // match the server.
 //
 // TODO(mnissler): Move serial_number back to the top once the server side uses
 // the correct serial number.
-const char* kMachineInfoSerialNumberKeys[] = {
+const char* const kMachineInfoSerialNumberKeys[] = {
   "Product_S/N",    // Lumpy/Alex devices
   "serial_number",  // VPD v2+ devices
   "Product_SN",     // Mario
   "sn",             // old ZGB devices (more recent ones use serial_number)
 };
 
 // Fetches a machine statistic value from StatisticsProvider, returns an empty
 // string on failure.
 std::string GetMachineStatistic(const std::string& key) {
   std::string value;
@@ skipping 186 matching lines @@
         local_state_->SetBoolean(
             prefs::kDeviceEnrollmentCanExit,
             GetMachineFlag(chromeos::system::kOemCanExitEnterpriseEnrollmentKey,
                            false));
       }
     }
   }
 }
 
 }  // namespace policy