Move StringToLowerASCII to base namespace

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 "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/strings/string_piece.h"
 #include "base/strings/string_util.h"
@@ skipping 33 matching lines @@
   return webui::GetI18nTemplateHtml(template_html, &values);
 }
 
 bool IsValidYouTubeVideo(const std::string& path) {
   unsigned len = strlen(kSlashVSlash);
 
   // check for more than just /v/ or /e/.
   if (path.length() <= len)
     return false;
 
-  std::string str = StringToLowerASCII(path);
+  std::string str = base::StringToLowerASCII(path);
   // Youtube flash url can start with /v/ or /e/.
   if (strncmp(str.data(), kSlashVSlash, len) != 0 &&
       strncmp(str.data(), kSlashESlash, len) != 0)
     return false;
 
   // Start after /v/
   for (unsigned i = len; i < path.length(); i++) {
     char c = str[i];
     if (isalpha(c) || isdigit(c) || c == '_' || c == '-')
       continue;
@@ skipping 54 matching lines @@
               gin::CreateHandle(isolate, this).ToV8());
 }
 
 gin::ObjectTemplateBuilder MobileYouTubePlugin::GetObjectTemplateBuilder(
     v8::Isolate* isolate) {
   return PluginPlaceholder::GetObjectTemplateBuilder(isolate)
     .SetMethod("openYoutubeURL", &MobileYouTubePlugin::OpenYoutubeUrlCallback);
 }
 
 }  // namespace plugins