Move directory creation functions to base namespace.

base/test/launcher/test_results_tracker.cc

Index: base/test/launcher/test_results_tracker.cc
diff --git a/base/test/launcher/test_results_tracker.cc b/base/test/launcher/test_results_tracker.cc
index 905b0f161275517a278b27d0b3e5458f72cdeb35..b2140daf9e201aa4cafddd5c8bbe31cbd635257e 100644
--- a/base/test/launcher/test_results_tracker.cc
+++ b/base/test/launcher/test_results_tracker.cc
@@ -130,7 +130,7 @@ bool TestResultsTracker::Init(const CommandLine& command_line) {
     LOG(WARNING) << "The output directory does not exist. "
                  << "Creating the directory: " << dir_name.value();
     // Create the directory if necessary (because the gtest does the same).
-    if (!file_util::CreateDirectory(dir_name)) {
+    if (!base::CreateDirectory(dir_name)) {
       LOG(ERROR) << "Failed to created directory " << dir_name.value();
       return false;
     }