Move file_util::Delete to the base namespace

cloud_print/service/win/installer.cc

Index: cloud_print/service/win/installer.cc
diff --git a/cloud_print/service/win/installer.cc b/cloud_print/service/win/installer.cc
index 57b477166bc910f0b7d23efadc7cfc24ee38829b..9d0de9e40eefb527e88e1f1a4e6e914f31c65da0 100644
--- a/cloud_print/service/win/installer.cc
+++ b/cloud_print/service/win/installer.cc
@@ -64,9 +64,9 @@ void DeleteShortcut(int dir_key, bool with_subdir) {
   if (path.empty())
     return;
   if (with_subdir)
-    file_util::Delete(path.DirName(), true);
+    base::Delete(path.DirName(), true);
   else
-    file_util::Delete(path, false);
+    base::Delete(path, false);
 }
 
 void DeleteShortcuts() {
@@ -95,7 +95,7 @@ HRESULT ProcessInstallerSwitches() {
     if (!old_location.empty() &&
         cloud_print::IsProgramsFilesParent(old_location) &&
         old_location != cloud_print::GetInstallLocation(kGoogleUpdateId)) {
-      file_util::Delete(old_location, true);
+      base::Delete(old_location, true);
     }
 
     cloud_print::SetGoogleUpdateKeys(
@@ -120,7 +120,7 @@ HRESULT ProcessInstallerSwitches() {
     base::FilePath delete_path = command_line.GetSwitchValuePath(kDeleteSwitch);
     if (!delete_path.empty() &&
         cloud_print::IsProgramsFilesParent(delete_path)) {
-      file_util::Delete(delete_path, true);
+      base::Delete(delete_path, true);
     }
     return S_OK;
   }