Make UTF16ToASCII and UTF16TOUTF8 take a StringPiece

components/autofill/content/renderer/form_cache.cc

 // Copyright 2013 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 "components/autofill/content/renderer/form_cache.h"
 
 #include "base/logging.h"
 #include "base/stl_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "components/autofill/content/renderer/form_autofill_util.h"
@@ skipping 25 matching lines @@
 using blink::WebString;
 using blink::WebTextAreaElement;
 using blink::WebVector;
 
 namespace autofill {
 
 namespace {
 
 void LogDeprecationMessages(const WebFormControlElement& element) {
   std::string autocomplete_attribute =
-      base::UTF16ToUTF8(element.getAttribute("autocomplete"));
+      base::UTF16ToUTF8(base::StringPiece16(
+          element.getAttribute("autocomplete")));
 
   static const char* const deprecated[] = { "region", "locality" };
   for (size_t i = 0; i < arraysize(deprecated); ++i) {
     if (autocomplete_attribute.find(deprecated[i]) == std::string::npos)
       continue;
     std::string msg = std::string("autocomplete='") + deprecated[i] +
         "' is deprecated and will soon be ignored. See http://goo.gl/YjeSsW";
     WebConsoleMessage console_message = WebConsoleMessage(
         WebConsoleMessage::LevelWarning,
         WebString(base::ASCIIToUTF16(msg)));
@@ skipping 277 matching lines @@
       const WebInputElement* input_element = toWebInputElement(&element);
       if (IsCheckableElement(input_element)) {
         initial_checked_state_.insert(
             std::make_pair(*input_element, input_element->isChecked()));
       }
     }
   }
 }
 
 }  // namespace autofill