Change UTF8ToUTF16 to accept const StringPiece&.

net/base/cookie_monster_perftest.cc

 // Copyright (c) 2010 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 <algorithm>
+
 #include "net/base/cookie_monster.h"
 
 #include "base/perftimer.h"
 #include "base/string_util.h"
 #include "base/stringprintf.h"
 #include "googleurl/src/gurl.h"
 #include "net/base/cookie_monster.h"
 #include "net/base/cookie_monster_store_test.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ skipping 279 matching lines @@
     EXPECT_TRUE(cm->SetCookie(gurl, cookie_line));
 
     PerfTimeLogger timer((std::string("GC_") + test_case.name).c_str());
     for (int i = 0; i < kNumCookies; i++)
       EXPECT_TRUE(cm->SetCookie(gurl, cookie_line));
     timer.Done();
   }
 }
 
 } // namespace