virtual keyboard: It is not longer necessary to 'reset' for tests.

ui/keyboard/keyboard.cc

 // Copyright (c) 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 "ui/keyboard/keyboard.h"
 
 #include "base/files/file_path.h"
 #include "base/path_service.h"
 #include "ui/base/resource/resource_bundle.h"
 
 namespace keyboard {
 
-static bool initialized = false;
-
-void ResetKeyboardForTesting() {
-  initialized = false;
-}
-
 void InitializeKeyboard() {
+  static bool initialized = false;
   if (initialized)
     return;
   initialized = true;
 
   base::FilePath pak_dir;
   PathService::Get(base::DIR_MODULE, &pak_dir);
   base::FilePath pak_file = pak_dir.Append(
       FILE_PATH_LITERAL("keyboard_resources.pak"));
   ui::ResourceBundle::GetSharedInstance().AddDataPackFromPath(
       pak_file, ui::SCALE_FACTOR_100P);
 }
 
 }  // namespace keyboard