Move PathIsWritable, DirectoryExists, ContentsEqual, and TextContentsEqual to the base namespace.

chrome/common/auto_start_linux.cc

Index: chrome/common/auto_start_linux.cc
diff --git a/chrome/common/auto_start_linux.cc b/chrome/common/auto_start_linux.cc
index 0033aae38e0ca9bc1e71fa89c281af126c5df743..b06c6f8b8a5b1fca612e8068e14676548d76a8e8 100644
--- a/chrome/common/auto_start_linux.cc
+++ b/chrome/common/auto_start_linux.cc
@@ -32,7 +32,7 @@ bool AutoStart::AddApplication(const std::string& autostart_filename,
                                bool is_terminal_app) {
   scoped_ptr<base::Environment> environment(base::Environment::Create());
   base::FilePath autostart_directory = GetAutostartDirectory(environment.get());
-  if (!file_util::DirectoryExists(autostart_directory) &&
+  if (!base::DirectoryExists(autostart_directory) &&
       !file_util::CreateDirectory(autostart_directory)) {
     return false;
   }