Rewrite std::string("") to std::string(), Linux edition.

chrome/browser/extensions/api/file_system/file_system_api.cc

Index: chrome/browser/extensions/api/file_system/file_system_api.cc
diff --git a/chrome/browser/extensions/api/file_system/file_system_api.cc b/chrome/browser/extensions/api/file_system/file_system_api.cc
index 3bb588ae564d0d71af24d7dfb7a37850594c7dda..e849e3cc262048643bc259c6f6b24011c7ba7206 100644
--- a/chrome/browser/extensions/api/file_system/file_system_api.cc
+++ b/chrome/browser/extensions/api/file_system/file_system_api.cc
@@ -435,8 +435,11 @@ class FileSystemChooseEntryFunction::FilePicker
     select_file_dialog_->SelectFile(picker_type,
                                     string16(),
                                     suggested_name,
-                                    &file_type_info, 0, FILE_PATH_LITERAL(""),
-                                    owning_window, NULL);
+                                    &file_type_info,
+                                    0,
+                                    base::FilePath::StringType(),
+                                    owning_window,
+                                    NULL);
   }
 
   virtual ~FilePicker() {}