Move StringPiece into the base namespace. It is colliding

chrome/browser/dom_ui/history_ui.cc

 // Copyright (c) 2006-2008 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/dom_ui/history_ui.h"
 
 #include "app/l10n_util.h"
 #include "app/resource_bundle.h"
 #include "base/message_loop.h"
 #include "base/string_piece.h"
@@ skipping 61 matching lines @@
       l10n_util::GetString(IDS_HISTORY_NO_RESULTS));
   localized_strings.SetString(L"noitems",
       l10n_util::GetString(IDS_HISTORY_NO_ITEMS));
   localized_strings.SetString(L"deleteday",
       l10n_util::GetString(IDS_HISTORY_DELETE_PRIOR_VISITS_LINK));
   localized_strings.SetString(L"deletedaywarning",
       l10n_util::GetString(IDS_HISTORY_DELETE_PRIOR_VISITS_WARNING));
 
   SetFontAndTextDirection(&localized_strings);
 
-  static const StringPiece history_html(
+  static const base::StringPiece history_html(
       ResourceBundle::GetSharedInstance().GetRawDataResource(
           IDR_HISTORY_HTML));
   const std::string full_html = jstemplate_builder::GetI18nTemplateHtml(
       history_html, &localized_strings);
 
   scoped_refptr<RefCountedBytes> html_bytes(new RefCountedBytes);
   html_bytes->data.resize(full_html.size());
   std::copy(full_html.begin(), full_html.end(), html_bytes->data.begin());
 
   SendResponse(request_id, html_bytes);
@@ skipping 284 matching lines @@
 const GURL HistoryUI::GetHistoryURLWithSearchText(const std::wstring& text) {
   return GURL(std::string(chrome::kChromeUIHistoryURL) + "#q=" +
               EscapeQueryParamValue(WideToUTF8(text)));
 }
 
 // static
 bool HistoryUI::GetFaviconResourceBytes(std::vector<unsigned char>* bytes) {
   return ResourceBundle::GetSharedInstance().
       LoadImageResourceBytes(IDR_HISTORY_FAVICON, bytes);
 }