Move WriteFile and WriteFileDescriptor from file_util to base namespace.

chrome/browser/browsing_data/browsing_data_remover_unittest.cc

Index: chrome/browser/browsing_data/browsing_data_remover_unittest.cc
diff --git a/chrome/browser/browsing_data/browsing_data_remover_unittest.cc b/chrome/browser/browsing_data/browsing_data_remover_unittest.cc
index 091989b024425e5ba26547837a36587e5fbb379d..e267683182d968d4fe0cf9559ccdf969a7973227 100644
--- a/chrome/browser/browsing_data/browsing_data_remover_unittest.cc
+++ b/chrome/browser/browsing_data/browsing_data_remover_unittest.cc
@@ -562,10 +562,10 @@ class RemoveLocalStorageTester {
     base::CreateDirectory(storage_path);
 
     // Write some files.
-    file_util::WriteFile(storage_path.Append(kDomStorageOrigin1), NULL, 0);
-    file_util::WriteFile(storage_path.Append(kDomStorageOrigin2), NULL, 0);
-    file_util::WriteFile(storage_path.Append(kDomStorageOrigin3), NULL, 0);
-    file_util::WriteFile(storage_path.Append(kDomStorageExt), NULL, 0);
+    base::WriteFile(storage_path.Append(kDomStorageOrigin1), NULL, 0);
+    base::WriteFile(storage_path.Append(kDomStorageOrigin2), NULL, 0);
+    base::WriteFile(storage_path.Append(kDomStorageOrigin3), NULL, 0);
+    base::WriteFile(storage_path.Append(kDomStorageExt), NULL, 0);
 
     // Tweak their dates.
     base::Time now = base::Time::Now();