Preload the visited link db on the file thread.

chrome/test/testing_profile.h

 // Copyright (c) 2009 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.
 
 #ifndef CHROME_TEST_TESTING_PROFILE_H_
 #define CHROME_TEST_TESTING_PROFILE_H_
 
 #include "base/base_paths.h"
 #include "base/file_util.h"
 #include "base/path_service.h"
@@ skipping 59 matching lines @@
     off_the_record_ = off_the_record;
   }
   virtual bool IsOffTheRecord() { return off_the_record_; }
   virtual Profile* GetOffTheRecordProfile() { return NULL; }
 
   virtual void DestroyOffTheRecordProfile() {}
 
   virtual Profile* GetOriginalProfile() { return this; }
   virtual webkit_database::DatabaseTracker* GetDatabaseTracker();
   virtual VisitedLinkMaster* GetVisitedLinkMaster() { return NULL; }
+  virtual void PreloadVisitedLinkMaster() {}
   virtual ExtensionsService* GetExtensionsService() { return NULL; }
   virtual UserScriptMaster* GetUserScriptMaster() { return NULL; }
   virtual ExtensionDevToolsManager* GetExtensionDevToolsManager() {
     return NULL;
   }
   virtual ExtensionProcessManager* GetExtensionProcessManager() { return NULL; }
   virtual ExtensionMessageService* GetExtensionMessageService() { return NULL; }
   virtual SSLHostState* GetSSLHostState() { return NULL; }
   virtual net::TransportSecurityState* GetTransportSecurityState() {
     return NULL;
@@ skipping 166 matching lines @@
 
   virtual ProfileId GetRuntimeId() {
     return original_profile_->GetRuntimeId();
   }
 
  protected:
   Profile* original_profile_;
 };
 
 #endif  // CHROME_TEST_TESTING_PROFILE_H_