Add unit test for lock and unlock virtual keyboard feature

chrome/browser/chromeos/extensions/virtual_keyboard_browsertest.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 <vector>
 
 #include "base/command_line.h"
 #include "chrome/browser/ui/browser.h"
@@ skipping 95 matching lines @@
 };
 
 IN_PROC_BROWSER_TEST_F(VirtualKeyboardBrowserTest, TypingTest) {
   RunTest(base::FilePath(FILE_PATH_LITERAL("typing_test.js")));
 }
 
 IN_PROC_BROWSER_TEST_F(VirtualKeyboardBrowserTest, ControlKeysTest) {
   RunTest(base::FilePath(FILE_PATH_LITERAL("control_keys_test.js")));
 }
 
+IN_PROC_BROWSER_TEST_F(VirtualKeyboardBrowserTest, HideKeyboardKeyTest) {
+  RunTest(base::FilePath(FILE_PATH_LITERAL("hide_keyboard_key_test.js")));
+}
+
 IN_PROC_BROWSER_TEST_F(VirtualKeyboardBrowserTest, KeysetTransitionTest) {
   RunTest(base::FilePath(FILE_PATH_LITERAL("keyset_transition_test.js")));
 }
 
 IN_PROC_BROWSER_TEST_F(VirtualKeyboardBrowserTest, IsKeyboardLoaded) {
   content::RenderViewHost* keyboard_rvh = GetKeyboardRenderViewHost();
   ASSERT_TRUE(keyboard_rvh);
   bool loaded = false;
   std::string script = "!!chrome.virtualKeyboardPrivate";
   EXPECT_TRUE(content::ExecuteScriptAndExtractBool(
@@ skipping 32 matching lines @@
   bool success = false;
   EXPECT_TRUE(content::ExecuteScriptAndExtractBool(
       browser_rvh,
       "success ? verifyInput('a') : waitForInput('a');",
       &success));
   ASSERT_TRUE(success);
 }
 
 // TODO(kevers|rsadam|bshe):  Add UI tests for remaining virtual keyboard
 // functionality.