Re-land r93365 - add RefCountedString

chrome/browser/ui/webui/print_preview_data_source.cc

 // Copyright (c) 2011 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/ui/webui/print_preview_data_source.h"
 
 #include <algorithm>
 
 #include "base/message_loop.h"
 #include "base/string_piece.h"
@@ skipping 140 matching lines @@
 
   if (path.empty()) {
     // Print Preview Index page.
     DictionaryValue localized_strings;
     SetLocalizedStrings(&localized_strings);
     SetFontAndTextDirection(&localized_strings);
 
     static const base::StringPiece print_html(
         ResourceBundle::GetSharedInstance().GetRawDataResource(
             IDR_PRINT_PREVIEW_HTML));
-    const std::string full_html = jstemplate_builder::GetI18nTemplateHtml(
+    std::string full_html = jstemplate_builder::GetI18nTemplateHtml(
         print_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);
+    SendResponse(request_id, base::RefCountedString::TakeString(&full_html));
     return;
   } else if (preview_data_requested && data->front()) {
     // Print Preview data.
     SendResponse(request_id, data);
     return;
  } else {
     // Invalid request.
     scoped_refptr<RefCountedBytes> empty_bytes(new RefCountedBytes);
     SendResponse(request_id, empty_bytes);
     return;
   }
 }
 
 std::string PrintPreviewDataSource::GetMimeType(const std::string& path) const {
   if (path.empty())
     return "text/html";  // Print Preview Index Page.
   return "application/pdf";  // Print Preview data
 }