Remove implicit conversions from scoped_refptr to T* in chrome/browser/autocomplete/

chrome/browser/autocomplete/history_quick_provider_unittest.cc

 // Copyright (c) 2012 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/autocomplete/history_quick_provider.h"
 
 #include <algorithm>
 #include <functional>
 #include <set>
 #include <string>
@@ skipping 145 matching lines @@
   // As above, simply with a cursor position specified.
   void RunTestWithCursor(const base::string16 text,
                          const size_t cursor_position,
                          bool prevent_inline_autocomplete,
                          std::vector<std::string> expected_urls,
                          bool can_inline_top_result,
                          base::string16 expected_fill_into_edit,
                          base::string16 autocompletion);
 
   history::HistoryBackend* history_backend() {
-    return history_service_->history_backend_;
+    return history_service_->history_backend_.get();
   }
 
   base::MessageLoopForUI message_loop_;
   content::TestBrowserThread ui_thread_;
   content::TestBrowserThread file_thread_;
 
   scoped_ptr<TestingProfile> profile_;
   HistoryService* history_service_;
 
   ACMatches ac_matches_;  // The resulting matches after running RunTest.
@@ skipping 598 matching lines @@
 
 TEST_F(HQPOrderingTest, TEAMatch) {
   std::vector<std::string> expected_urls;
   expected_urls.push_back("http://www.teamliquid.net/");
   expected_urls.push_back("http://www.teamliquid.net/tlpd");
   expected_urls.push_back("http://www.teamliquid.net/tlpd/korean/players");
   RunTest(ASCIIToUTF16("tea"), false, expected_urls, true,
           ASCIIToUTF16("www.teamliquid.net"),
                  ASCIIToUTF16("mliquid.net"));
 }