Remove redundant c_str() calls.

chrome/browser/extensions/api/tabs/tabs_api.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/extensions/api/tabs/tabs_api.h"
 
 #include <stddef.h>
 #include <algorithm>
 #include <limits>
 #include <memory>
@@ skipping 1764 matching lines @@
   }
 
   registrar_.RemoveAll();
 
   // Call GotLanguage in all cases as we want to guarantee the callback is
   // called for every API call the extension made.
   GotLanguage(language);
 }
 
 void TabsDetectLanguageFunction::GotLanguage(const std::string& language) {
-  SetResult(base::MakeUnique<base::StringValue>(language.c_str()));
+  SetResult(base::MakeUnique<base::StringValue>(language));
   SendResponse(true);
 
   Release();  // Balanced in Run()
 }
 
 ExecuteCodeInTabFunction::ExecuteCodeInTabFunction()
     : chrome_details_(this), execute_tab_id_(-1) {
 }
 
 ExecuteCodeInTabFunction::~ExecuteCodeInTabFunction() {}
@@ skipping 314 matching lines @@
       params->tab_id
           ? ErrorUtils::FormatErrorMessage(keys::kCannotDiscardTab,
                                            base::IntToString(*params->tab_id))
           : keys::kCannotFindTabToDiscard));
 }
 
 TabsDiscardFunction::TabsDiscardFunction() {}
 TabsDiscardFunction::~TabsDiscardFunction() {}
 
 }  // namespace extensions