Makes V4UpdateProtocolManager auto-schedule update fetching

components/safe_browsing_db/database_manager.cc

 // Copyright 2015 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 "components/safe_browsing_db/database_manager.h"
 
 #include "components/safe_browsing_db/v4_get_hash_protocol_manager.h"
-#include "components/safe_browsing_db/v4_update_protocol_manager.h"
 #include "content/public/browser/browser_thread.h"
 #include "net/url_request/url_request_context_getter.h"
 #include "url/gurl.h"
 
 using content::BrowserThread;
 
 namespace safe_browsing {
 
 SafeBrowsingDatabaseManager::SafeBrowsingDatabaseManager()
-    : v4_get_hash_protocol_manager_(NULL),
-      v4_update_protocol_manager_(NULL) {
+    : v4_get_hash_protocol_manager_(NULL) {
 }
 
 SafeBrowsingDatabaseManager::~SafeBrowsingDatabaseManager() {
   DCHECK(v4_get_hash_protocol_manager_ == NULL);
-  DCHECK(v4_update_protocol_manager_ == NULL);
 }
 
 void SafeBrowsingDatabaseManager::StartOnIOThread(
     net::URLRequestContextGetter* request_context_getter,
     const V4ProtocolConfig& config) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
   if (request_context_getter) {
     // Instantiate a V4GetHashProtocolManager.
     v4_get_hash_protocol_manager_ = V4GetHashProtocolManager::Create(
         request_context_getter, config);
-    // Instantiate a V4UpdateProtocolManager.
-    v4_update_protocol_manager_ = V4UpdateProtocolManager::Create(
-        request_context_getter, config);
   }
 }
 
 // |shutdown| not used. Destroys the v4 protocol managers. This may be called
 // multiple times during the life of the DatabaseManager.
 // Must be called on IO thread.
 void SafeBrowsingDatabaseManager::StopOnIOThread(bool shutdown) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
   // This cancels all in-flight GetHash requests.
   if (v4_get_hash_protocol_manager_) {
     delete v4_get_hash_protocol_manager_;
     v4_get_hash_protocol_manager_ = NULL;
   }
-
-  // This cancels any in-flight update request.
-  if (v4_update_protocol_manager_) {
-    delete v4_update_protocol_manager_;
-    v4_update_protocol_manager_ = NULL;
-  }
 }
 
 void SafeBrowsingDatabaseManager::CheckApiBlacklistUrl(const GURL& url,
                                                        Client* client) {
   // TODO(kcarattini): Implement this.
 }
 
 }  // namespace safe_browsing