Move WriteFile and WriteFileDescriptor from file_util to base namespace.

chrome/browser/ui/startup/startup_browser_creator.cc

Index: chrome/browser/ui/startup/startup_browser_creator.cc
diff --git a/chrome/browser/ui/startup/startup_browser_creator.cc b/chrome/browser/ui/startup/startup_browser_creator.cc
index 703e1363f16f788aaa9a3912b7eb38a34c7a4a94..b9400c20055e15eb4604446bac38356a5a732901 100644
--- a/chrome/browser/ui/startup/startup_browser_creator.cc
+++ b/chrome/browser/ui/startup/startup_browser_creator.cc
@@ -240,8 +240,8 @@ void DumpBrowserHistograms(const base::FilePath& output_file) {
   base::ThreadRestrictions::AssertIOAllowed();
 
   std::string output_string(base::StatisticsRecorder::ToJSON(std::string()));
-  file_util::WriteFile(output_file, output_string.data(),
-                       static_cast<int>(output_string.size()));
+  base::WriteFile(output_file, output_string.data(),
+                  static_cast<int>(output_string.size()));
 }
 
 }  // namespace