Move directory creation functions to base namespace.

webkit/browser/quota/quota_manager.cc

Index: webkit/browser/quota/quota_manager.cc
diff --git a/webkit/browser/quota/quota_manager.cc b/webkit/browser/quota/quota_manager.cc
index 123307ef034b7a7ebcbc58fd4b2b071dcb682e14..0663935a214a90756c9bc761b55034e3a873894e 100644
--- a/webkit/browser/quota/quota_manager.cc
+++ b/webkit/browser/quota/quota_manager.cc
@@ -199,7 +199,7 @@ bool UpdateModifiedTimeOnDBThread(const GURL& origin,
 
 int64 CallSystemGetAmountOfFreeDiskSpace(const base::FilePath& profile_path) {
   // Ensure the profile path exists.
-  if(!file_util::CreateDirectory(profile_path)) {
+  if(!base::CreateDirectory(profile_path)) {
     LOG(WARNING) << "Create directory failed for path" << profile_path.value();
     return 0;
   }