Remove refptr usages from SpellCheckHost

chrome/browser/spellchecker/spellcheck_profile.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/spellchecker/spellcheck_profile.h"
 
 #include "base/file_util.h"
 #include "base/lazy_instance.h"
 #include "base/string_split.h"
 #include "base/string_util.h"
@@ skipping 32 matching lines @@
   // If we are already loading the spellchecker, and this is just a hint to
   // load the spellchecker, do nothing.
   if (!force && host_.get())
     return REINITIALIZE_DID_NOTHING;
 
   host_ready_ = false;
 
   bool host_deleted = false;
   if (host_.get()) {
     host_->UnsetProfile();
-    host_ = NULL;
+    host_.reset();
     host_deleted = true;
   }
 
   if (enable) {
     // Retrieve the (perhaps updated recently) dictionary name from preferences.
-    host_ = CreateHost(this, language, request_context, metrics_.get());
+    host_.reset(CreateHost(this, language, request_context, metrics_.get()));
     return REINITIALIZE_CREATED_HOST;
   }
 
   return host_deleted ? REINITIALIZE_REMOVED_HOST : REINITIALIZE_DID_NOTHING;
 }
 
 SpellCheckHost* SpellCheckProfile::CreateHost(
     SpellCheckProfileProvider* provider,
     const std::string& language,
     net::URLRequestContextGetter* request_context,
@@ skipping 68 matching lines @@
 }
 
 const FilePath& SpellCheckProfile::GetCustomDictionaryPath() {
   if (!custom_dictionary_path_.get()) {
     custom_dictionary_path_.reset(
         new FilePath(profile_dir_.Append(chrome::kCustomDictionaryFileName)));
   }
 
   return *custom_dictionary_path_;
 }