Remove task.h and finish base::Bind() migration.

chrome/browser/search_engines/search_host_to_urls_map.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/search_engines/search_host_to_urls_map.h"
 
 #include "base/memory/scoped_ptr.h"
-#include "base/task.h"
 #include "chrome/browser/search_engines/template_url.h"
 #include "chrome/browser/search_engines/template_url_service.h"
 
 SearchHostToURLsMap::SearchHostToURLsMap()
     : initialized_(false) {
 }
 
 SearchHostToURLsMap::~SearchHostToURLsMap() {
 }
 
@@ skipping 113 matching lines @@
     if (url_set_iterator != i->second.end()) {
       i->second.erase(url_set_iterator);
       if (i->second.empty())
         host_to_urls_map_.erase(i);
       // A given TemplateURL only occurs once in the map. As soon as we find the
       // entry, stop.
       return;
     }
   }
 }