1. Create and use the TopSites database file....

chrome/browser/profile.cc

 // Copyright (c) 2010 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/profile.h"
 
 #include "app/resource_bundle.h"
 #include "app/theme_provider.h"
 #include "base/command_line.h"
 #include "base/env_var.h"
@@ skipping 1385 matching lines @@
     thumbnail_store_ = new ThumbnailStore;
     thumbnail_store_->Init(
         GetPath().Append(chrome::kNewTabThumbnailsFilename), this);
   }
   return thumbnail_store_.get();
 }
 
 history::TopSites* ProfileImpl::GetTopSites() {
   if (!top_sites_.get()) {
     top_sites_ = new history::TopSites(this);
-    top_sites_->Init();
+    top_sites_->Init(GetPath().Append(chrome::kTopSitesFilename));
   }
   return top_sites_;
 }
 
 void ProfileImpl::ResetTabRestoreService() {
   tab_restore_service_ = NULL;
 }
 
 SpellCheckHost* ProfileImpl::GetSpellCheckHost() {
   return spellcheck_host_ready_ ? spellcheck_host_.get() : NULL;
@@ skipping 116 matching lines @@
                                  CommandLine::ForCurrentProcess()));
   sync_service_.reset(
       profile_sync_factory_->CreateProfileSyncService());
   sync_service_->Initialize();
 }
 
 void ProfileImpl::InitCloudPrintProxyService() {
   cloud_print_proxy_service_.reset(new CloudPrintProxyService(this));
   cloud_print_proxy_service_->Initialize();
 }