Makes V4UpdateProtocolManager auto-schedule update fetching

components/safe_browsing_db/database_manager.cc

Index: components/safe_browsing_db/database_manager.cc
diff --git a/components/safe_browsing_db/database_manager.cc b/components/safe_browsing_db/database_manager.cc
index e4cc777c32b40548757033b4e8f35da4af962ca3..b8998b4431fcdde86dadd3b664dde8504c2f1b05 100644
--- a/components/safe_browsing_db/database_manager.cc
+++ b/components/safe_browsing_db/database_manager.cc
@@ -5,7 +5,6 @@
 #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"
@@ -15,13 +14,11 @@ 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(
@@ -32,9 +29,6 @@ void SafeBrowsingDatabaseManager::StartOnIOThread(
     // 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);
   }
 }
 
@@ -48,12 +42,6 @@ void SafeBrowsingDatabaseManager::StopOnIOThread(bool shutdown) {
     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,