Move directory creation functions to base namespace.

base/file_util.cc

Index: base/file_util.cc
diff --git a/base/file_util.cc b/base/file_util.cc
index f6d8657744d606e611a5f30610369465c3c9b229..1639ccee6ea04754028fef37a6a827803ab44ef8 100644
--- a/base/file_util.cc
+++ b/base/file_util.cc
@@ -161,6 +161,10 @@ FILE* CreateAndOpenTemporaryFile(FilePath* path) {
   return CreateAndOpenTemporaryFileInDir(directory, path);
 }
 
+bool CreateDirectory(const FilePath& full_path) {
+  return CreateDirectoryAndGetError(full_path, NULL);
+}
+
 }  // namespace base
 
 // -----------------------------------------------------------------------------
@@ -171,10 +175,6 @@ using base::FileEnumerator;
 using base::FilePath;
 using base::kMaxUniqueFiles;
 
-bool CreateDirectory(const base::FilePath& full_path) {
-  return CreateDirectoryAndGetError(full_path, NULL);
-}
-
 bool GetFileSize(const FilePath& file_path, int64* file_size) {
   base::PlatformFileInfo info;
   if (!GetFileInfo(file_path, &info))