Update uses of UTF conversions in content/ to use the base:: namespace.

content/renderer/pepper/pepper_file_chooser_host.cc

 // Copyright (c) 2012 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 "content/renderer/pepper/pepper_file_chooser_host.h"
 
 #include "base/files/file_path.h"
 #include "base/strings/utf_string_conversions.h"
 #include "content/public/renderer/renderer_ppapi_host.h"
 #include "content/renderer/pepper/pepper_file_ref_renderer_host.h"
@@ skipping 85 matching lines @@
   return PP_ERROR_FAILED;
 }
 
 void PepperFileChooserHost::StoreChosenFiles(
     const std::vector<ChosenFileInfo>& files) {
   std::vector<IPC::Message> create_msgs;
   std::vector<base::FilePath> file_paths;
   std::vector<std::string> display_names;
   for (size_t i = 0; i < files.size(); i++) {
 #if defined(OS_WIN)
-    base::FilePath file_path(UTF8ToWide(files[i].path));
+    base::FilePath file_path(base::UTF8ToWide(files[i].path));
 #else
     base::FilePath file_path(files[i].path);
 #endif
     file_paths.push_back(file_path);
     create_msgs.push_back(PpapiHostMsg_FileRef_CreateExternal(file_path));
     display_names.push_back(files[i].display_name);
   }
 
   if (!files.empty()) {
     renderer_ppapi_host_->CreateBrowserResourceHosts(
@@ skipping 81 matching lines @@
 
   reply_context_.params.set_result(PP_OK);
   host()->SendReply(reply_context_,
                     PpapiPluginMsg_FileChooser_ShowReply(chosen_files));
   reply_context_ = ppapi::host::ReplyMessageContext();
   handler_ = NULL;  // Handler deletes itself.
 }
 
 }  // namespace content