Make callers of CommandLine use it via the base:: namespace.

chrome/browser/signin/chrome_signin_client.cc

 // Copyright 2014 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/signin/chrome_signin_client.h"
 
 #include "base/command_line.h"
 #include "base/guid.h"
 #include "base/prefs/pref_service.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 124 matching lines @@
   if (profile_->IsLegacySupervised()) {
     LOG(ERROR) << "Attempt to revoke supervised user refresh "
                << "token detected, ignoring.";
     return false;
   }
 #endif
   return true;
 }
 
 std::string ChromeSigninClient::GetSigninScopedDeviceId() {
-  if (CommandLine::ForCurrentProcess()->HasSwitch(
+  if (base::CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kDisableSigninScopedDeviceId)) {
     return std::string();
   }
 
   std::string signin_scoped_device_id =
       GetPrefs()->GetString(prefs::kGoogleServicesSigninScopedDeviceId);
   if (signin_scoped_device_id.empty()) {
     // If device_id doesn't exist then generate new and save in prefs.
     signin_scoped_device_id = base::GenerateGUID();
     DCHECK(!signin_scoped_device_id.empty());
@@ skipping 69 matching lines @@
 
 void ChromeSigninClient::PostSignedIn(const std::string& account_id,
                                       const std::string& username,
                                       const std::string& password) {
 #if !defined(OS_ANDROID) && !defined(OS_IOS) && !defined(OS_CHROMEOS)
   // Don't store password hash except when lock is available for the user.
   if (!password.empty() && profiles::IsLockAvailable(profile_))
     chrome::SetLocalAuthCredentials(profile_, password);
 #endif
 }