Move WriteFile and WriteFileDescriptor from file_util to base namespace.

chrome/browser/chromeos/drive/file_write_watcher_unittest.cc

 // Copyright 2013 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 "chrome/browser/chromeos/drive/file_write_watcher.h"
 
 #include <set>
 
 #include "base/bind.h"
 #include "base/file_util.h"
@@ skipping 29 matching lines @@
   std::set<std::string> expected_upload_;
   base::Closure quit_closure_;
 };
 
 // Writes something on the file at |path|.
 void WriteSomethingAfterStartWatch(const base::FilePath& path,
                                    bool watch_success) {
   EXPECT_TRUE(watch_success) << path.value();
 
   const char kDummy[] = "hello";
-  ASSERT_TRUE(file_util::WriteFile(path, kDummy, arraysize(kDummy)));
+  ASSERT_TRUE(base::WriteFile(path, kDummy, arraysize(kDummy)));
 }
 
 class FileWriteWatcherTest : public testing::Test {
  protected:
   // The test requires UI thread (FileWriteWatcher DCHECKs that its public
   // interface is running on UI thread) and FILE thread (Linux version of
   // base::FilePathWatcher needs to live on an IOAllowed thread with TYPE_IO,
   // which is FILE thread in the production environment).
   //
   // By using the IO_MAINLOOP test thread bundle, the main thread is used
@@ skipping 50 matching lines @@
 
   // Unwatched write. It shouldn't be notified.
   WriteSomethingAfterStartWatch(path4, true);
 
   // The loop should quit if all the three paths are notified to be written.
   loop.Run();
 }
 
 }  // namespace internal
 }  // namespace drive