Cleanup: Remove some unneeded string allocations.

chrome/browser/rlz/rlz.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.
 //
 // This code glues the RLZ library DLL with Chrome. It allows Chrome to work
 // with or without the DLL being present. If the DLL is not present the
 // functions do nothing and just return false.
 
 #include "chrome/browser/rlz/rlz.h"
 
@@ skipping 552 matching lines @@
 
   // Make sure we don't access disk outside of the I/O thread.
   // In such case we repost the task on the right thread and return error.
   if (ScheduleGetAccessPointRlz(point))
     return false;
 
   char str_rlz[rlz_lib::kMaxRlzLength + 1];
   if (!rlz_lib::GetAccessPointRlz(point, str_rlz, rlz_lib::kMaxRlzLength))
     return false;
 
-  base::string16 rlz_local(base::ASCIIToUTF16(std::string(str_rlz)));
+  base::string16 rlz_local(base::ASCIIToUTF16(str_rlz));
   if (rlz)
     *rlz = rlz_local;
 
   base::AutoLock lock(cache_lock_);
   rlz_cache_[point] = rlz_local;
   return true;
 }
 
 bool RLZTracker::ScheduleGetAccessPointRlz(rlz_lib::AccessPoint point) {
   if (!BrowserThread::CurrentlyOn(BrowserThread::UI))
@@ skipping 46 matching lines @@
 void RLZTracker::EnableZeroDelayForTesting() {
   GetInstance()->min_init_delay_ = base::TimeDelta();
 }
 
 #if !defined(OS_IOS)
 // static
 void RLZTracker::RecordAppListSearch() {
   GetInstance()->RecordFirstSearch(RLZTracker::ChromeAppList());
 }
 #endif