Fixed remaining CL comments from review of http://codereview.chromium.org/9561009/

chrome/browser/chromeos/gdata/gdata_file_system.h

 // 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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_GDATA_GDATA_FILE_SYSTEM_H_
 #define CHROME_BROWSER_CHROMEOS_GDATA_GDATA_FILE_SYSTEM_H_
 
 #include <map>
 
 #include "base/gtest_prod_util.h"
@@ skipping 272 matching lines @@
   friend class GDataFileSystemTest;
   FRIEND_TEST_ALL_PREFIXES(GDataFileSystemTest,
                            FindFirstMissingParentDirectory);
 
   // Defines possible search results of FindFirstMissingParentDirectory().
   enum FindMissingDirectoryResult {
     // Target directory found, it's not a directory.
     FOUND_INVALID,
     // Found missing directory segment while searching for given directory.
     FOUND_MISSING,
-    // Found target directory, it's already exists.
+    // Found target directory, it already exists.
     DIRECTORY_ALREADY_PRESENT,
   };
 
   // Defines set of parameters passes to intermediate callbacks during
   // execution of CreateDirectory() method.
   struct CreateDirectoryParams {
     CreateDirectoryParams(const FilePath& created_directory_path,
                           const FilePath& target_directory_path,
                           bool is_exclusive,
                           bool is_recursive,
@@ skipping 117 matching lines @@
   virtual ~GDataFileSystemFactory();
 
   // ProfileKeyedServiceFactory:
   virtual ProfileKeyedService* BuildServiceInstanceFor(
       Profile* profile) const OVERRIDE;
 };
 
 }  // namespace gdata
 
 #endif  // CHROME_BROWSER_CHROMEOS_GDATA_GDATA_FILE_SYSTEM_H_