Don't set backup SafeBrowsing urls when kSbURLPrefix is specified.

chrome/browser/safe_browsing/safe_browsing_service.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/safe_browsing/safe_browsing_service.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/callback.h"
 #include "base/command_line.h"
@@ skipping 340 matching lines @@
 #if defined(GOOGLE_CHROME_BUILD)
   config.client_name = "googlechrome";
 #else
   config.client_name = "chromium";
 #endif
 #endif
   CommandLine* cmdline = CommandLine::ForCurrentProcess();
   config.disable_auto_update =
       cmdline->HasSwitch(switches::kSbDisableAutoUpdate) ||
       cmdline->HasSwitch(switches::kDisableBackgroundNetworking);
-  config.url_prefix =
-      cmdline->HasSwitch(switches::kSbURLPrefix) ?
-      cmdline->GetSwitchValueASCII(switches::kSbURLPrefix) :
-      kSbDefaultURLPrefix;
-  config.backup_connect_error_url_prefix = kSbBackupConnectErrorURLPrefix;
-  config.backup_http_error_url_prefix = kSbBackupHttpErrorURLPrefix;
-  config.backup_network_error_url_prefix = kSbBackupNetworkErrorURLPrefix;
+  if (cmdline->HasSwitch(switches::kSbURLPrefix)) {
+    config.url_prefix = cmdline->GetSwitchValueASCII(switches::kSbURLPrefix);
+  } else {
+    config.url_prefix = kSbDefaultURLPrefix;
+    config.backup_connect_error_url_prefix = kSbBackupConnectErrorURLPrefix;
+    config.backup_http_error_url_prefix = kSbBackupHttpErrorURLPrefix;
+    config.backup_network_error_url_prefix = kSbBackupNetworkErrorURLPrefix;
+  }
 
 #if defined(FULL_SAFE_BROWSING)
   DCHECK(database_manager_);
   database_manager_->StartOnIOThread();
 
   DCHECK(!protocol_manager_);
   protocol_manager_ =
       SafeBrowsingProtocolManager::Create(database_manager_,
                                           url_request_context_getter_,
                                           config);
@@ skipping 106 matching lines @@
 #if defined(FULL_SAFE_BROWSING)
   if (csd_service_.get())
     csd_service_->SetEnabledAndRefreshState(enable);
   if (download_service_.get()) {
     download_service_->SetEnabled(
         enable && !CommandLine::ForCurrentProcess()->HasSwitch(
             switches::kDisableImprovedDownloadProtection));
   }
 #endif
 }