Move StringPiece into the base namespace. It is colliding

chrome/browser/dom_ui/print_ui.cc

 // Copyright (c) 2009 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/print_ui.h"
 
 #include "app/l10n_util.h"
 #include "app/resource_bundle.h"
 #include "base/message_loop.h"
 #include "base/thread.h"
@@ skipping 33 matching lines @@
 
 void PrintUIHTMLSource::StartDataRequest(const std::string& path,
                                          int request_id) {
   // Setup a dictionary so that the html page could read the values.
   DictionaryValue localized_strings;
   localized_strings.SetString(L"title", l10n_util::GetString(IDS_PRINT));
 
   SetFontAndTextDirection(&localized_strings);
 
   // Setup the print html page.
-  static const StringPiece print_html(
+  static const base::StringPiece print_html(
       ResourceBundle::GetSharedInstance().GetRawDataResource(
           IDR_PRINT_TAB_HTML));
   const std::string full_html = jstemplate_builder::GetI18nTemplateHtml(
       print_html, &localized_strings);
 
   // Load the print html page into the tab contents.
   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);
 }