Start and stop the safe browsing service depending on whether any profile is using it.

chrome/browser/profiles/profile_impl.cc

 // Copyright (c) 2011 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/profiles/profile_impl.h"
 
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
 #include "base/environment.h"
 #include "base/file_path.h"
@@ skipping 409 matching lines @@
 
   // Make sure we initialize the ProfileIOData after everything else has been
   // initialized that we might be reading from the IO thread.
   io_data_.Init(cookie_path, cache_path, cache_max_size,
                 media_cache_path, media_cache_max_size, extensions_cookie_path,
                 app_path);
 
   // Creation has been finished.
   if (delegate_)
     delegate_->OnProfileCreated(this, true);
+
+  NotificationService::current()->Notify(
+      chrome::NOTIFICATION_PROFILE_CREATED,
+      Source<Profile>(this),
+      NotificationService::NoDetails());
 }
 
 void ProfileImpl::InitExtensions(bool extensions_enabled) {
   if (user_script_master_ || extension_service_.get())
     return;  // Already initialized.
 
   const CommandLine* command_line = CommandLine::ForCurrentProcess();
   if (command_line->HasSwitch(
       switches::kEnableExtensionTimelineApi)) {
     extension_devtools_manager_ = new ExtensionDevToolsManager(this);
@@ skipping 1212 matching lines @@
   if (!prerender::PrerenderManager::IsPrerenderingPossible())
     return NULL;
   if (!prerender_manager_.get()) {
     CHECK(g_browser_process->prerender_tracker());
     prerender_manager_.reset(
         new prerender::PrerenderManager(
             this, g_browser_process->prerender_tracker()));
   }
   return prerender_manager_.get();
 }