Move StringPiece into the base namespace. It is colliding

chrome/renderer/render_view.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/renderer/render_view.h"
 
 #include <algorithm>
 #include <string>
 #include <vector>
 
@@ skipping 3111 matching lines @@
       NavigationState::FromDataSource(frame->provisionalDataSource());
   navigation_state->set_alt_error_page_fetcher(
       new AltErrorPageResourceFetcher(
           error_page_url, frame, error,
           NewCallback(this, &RenderView::AltErrorPageFinished)));
   return true;
 }
 
 std::string RenderView::GetAltHTMLForTemplate(
     const DictionaryValue& error_strings, int template_resource_id) const {
-  const StringPiece template_html(
+  const base::StringPiece template_html(
       ResourceBundle::GetSharedInstance().GetRawDataResource(
           template_resource_id));
 
   if (template_html.empty()) {
     NOTREACHED() << "unable to load template. ID: " << template_resource_id;
     return "";
   }
 
   // "t" is the id of the templates root node.
   return jstemplate_builder::GetTemplatesHtml(
@@ skipping 320 matching lines @@
   EditCommands::iterator end = edit_commands_.end();
 
   for (; it != end; ++it) {
     if (!frame->executeCommand(WebString::fromUTF8(it->name),
                                WebString::fromUTF8(it->value)))
       break;
   }
 
   return true;
 }