Move directory creation functions to base namespace.

chrome/browser/performance_monitor/performance_monitor_browsertest.cc

Index: chrome/browser/performance_monitor/performance_monitor_browsertest.cc
diff --git a/chrome/browser/performance_monitor/performance_monitor_browsertest.cc b/chrome/browser/performance_monitor/performance_monitor_browsertest.cc
index 045d893ee29350811dac8dea128897662ad94ed7..e549bfd4e2428f13093d5edbcd990ffc6f9ad716 100644
--- a/chrome/browser/performance_monitor/performance_monitor_browsertest.cc
+++ b/chrome/browser/performance_monitor/performance_monitor_browsertest.cc
@@ -300,7 +300,7 @@ class PerformanceMonitorUncleanExitBrowserTest
 
     base::FilePath first_profile =
         user_data_directory.AppendASCII(first_profile_name_);
-    CHECK(file_util::CreateDirectory(first_profile));
+    CHECK(base::CreateDirectory(first_profile));
 
     base::FilePath stock_prefs_file;
     PathService::Get(chrome::DIR_TEST_DATA, &stock_prefs_file);
@@ -319,7 +319,7 @@ class PerformanceMonitorUncleanExitBrowserTest
 
     base::FilePath second_profile =
         user_data_directory.AppendASCII(second_profile_name_);
-    CHECK(file_util::CreateDirectory(second_profile));
+    CHECK(base::CreateDirectory(second_profile));
 
     base::FilePath second_profile_prefs_file =
         second_profile.Append(chrome::kPreferencesFilename);