[WIP] make GURL::path() return a StringPiece

components/plugins/renderer/mobile_youtube_plugin.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/plugins/renderer/mobile_youtube_plugin.h"
 
 #include <stddef.h>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 10 matching lines @@
 using blink::WebPlugin;
 using blink::WebURLRequest;
 
 const char* const kSlashVSlash = "/v/";
 const char* const kSlashESlash = "/e/";
 
 namespace {
 
 std::string GetYoutubeVideoId(const blink::WebPluginParams& params) {
   GURL url(params.url);
-  std::string video_id = url.path().substr(strlen(kSlashVSlash));
+  base::StringPiece video_id = url.path().substr(strlen(kSlashVSlash));
 
   // Extract just the video id
   size_t video_id_end = video_id.find('&');
   if (video_id_end != std::string::npos)
     video_id = video_id.substr(0, video_id_end);
-  return video_id;
+  return video_id.as_string();
 }
 
 std::string HtmlData(const blink::WebPluginParams& params,
                      base::StringPiece template_html) {
   base::DictionaryValue values;
   values.SetString("video_id", GetYoutubeVideoId(params));
   return webui::GetI18nTemplateHtml(template_html, &values);
 }
 
-bool IsValidYouTubeVideo(const std::string& path) {
+bool IsValidYouTubeVideo(const base::StringPiece& path) {
   unsigned len = strlen(kSlashVSlash);
 
   // check for more than just /v/ or /e/.
   if (path.length() <= len)
     return false;
 
   // Youtube flash url can start with /v/ or /e/.
   if (!base::StartsWith(path, kSlashVSlash,
                         base::CompareCase::INSENSITIVE_ASCII) &&
       !base::StartsWith(path, kSlashESlash,
@@ skipping 58 matching lines @@
 }
 
 gin::ObjectTemplateBuilder MobileYouTubePlugin::GetObjectTemplateBuilder(
     v8::Isolate* isolate) {
   return gin::Wrappable<MobileYouTubePlugin>::GetObjectTemplateBuilder(isolate)
       .SetMethod("openYoutubeURL",
                  &MobileYouTubePlugin::OpenYoutubeUrlCallback);
 }
 
 }  // namespace plugins