Move WriteFile and WriteFileDescriptor from file_util to base namespace.

chrome/browser/extensions/app_background_page_apitest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/path_service.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/background/background_contents_service.h"
 #include "chrome/browser/background/background_contents_service_factory.h"
 #include "chrome/browser/background/background_mode_manager.h"
@@ skipping 33 matching lines @@
     command_line->AppendSwitch(extensions::switches::kAllowHTTPBackgroundPage);
   }
 
   bool CreateApp(const std::string& app_manifest,
                  base::FilePath* app_dir) {
     if (!app_dir_.CreateUniqueTempDir()) {
       LOG(ERROR) << "Unable to create a temporary directory.";
       return false;
     }
     base::FilePath manifest_path = app_dir_.path().AppendASCII("manifest.json");
-    int bytes_written = file_util::WriteFile(manifest_path,
-                                             app_manifest.data(),
-                                             app_manifest.size());
+    int bytes_written = base::WriteFile(manifest_path,
+                                        app_manifest.data(),
+                                        app_manifest.size());
     if (bytes_written != static_cast<int>(app_manifest.size())) {
       LOG(ERROR) << "Unable to write complete manifest to file. Return code="
                  << bytes_written;
       return false;
     }
     *app_dir = app_dir_.path();
     return true;
   }
 
   bool WaitForBackgroundMode(bool expected_background_mode) {
@@ skipping 571 matching lines @@
     extensions::ExtensionSystem::Get(browser()->profile())->process_manager();
   ImpulseCallbackCounter idle_impulse_counter(manager, extension()->id());
   EXPECT_TRUE(nacl_modules_loaded.WaitUntilSatisfied());
 
   manager->SetKeepaliveImpulseDecrementCallbackForTesting(
       idle_impulse_counter.SetGoalAndGetCallback(1));
   nacl_modules_loaded.Reply("be idle");
   idle_impulse_counter.Wait();
 }