Change UTF8ToUTF16 to accept const StringPiece&.

chrome/renderer/localized_error.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 "chrome/renderer/localized_error.h"
 
 #include "base/i18n/rtl.h"
 #include "base/logging.h"
 #include "base/string16.h"
 #include "base/string_number_conversions.h"
@@ skipping 337 matching lines @@
       LookupErrorMap(error_domain, error_code);
   if (error_map)
     options = *error_map;
 
   if (options.suggestions != SUGGEST_NONE) {
     error_strings->SetString(
         "suggestionsHeading",
         l10n_util::GetStringUTF16(IDS_ERRORPAGES_SUGGESTION_HEADING));
   }
 
-  string16 failed_url(ASCIIToUTF16(error.unreachableURL.spec()));
+  string16 failed_url(ASCIIToUTF16(std::string(error.unreachableURL.spec())));
   // URLs are always LTR.
   if (rtl)
     base::i18n::WrapStringWithLTRFormatting(&failed_url);
   error_strings->SetString("title",
       l10n_util::GetStringFUTF16(options.title_resource_id, failed_url));
   error_strings->SetString("heading",
       l10n_util::GetStringUTF16(options.heading_resource_id));
 
   DictionaryValue* summary = new DictionaryValue;
   summary->SetString("msg",
@@ skipping 166 matching lines @@
                                        failed_url.c_str()));
 
   error_strings->SetString("title", app->name());
   error_strings->SetString("icon",
       app->GetIconURL(Extension::EXTENSION_ICON_LARGE,
                       ExtensionIconSet::MATCH_SMALLER).spec());
   error_strings->SetString("name", app->name());
   error_strings->SetString("msg",
       l10n_util::GetStringUTF16(IDS_ERRORPAGES_APP_WARNING));
 }