Add unit test for lock and unlock virtual keyboard feature

chrome/browser/chromeos/extensions/virtual_keyboard_browsertest.cc

Index: chrome/browser/chromeos/extensions/virtual_keyboard_browsertest.cc
diff --git a/chrome/browser/chromeos/extensions/virtual_keyboard_browsertest.cc b/chrome/browser/chromeos/extensions/virtual_keyboard_browsertest.cc
index fa941be823a4ed80c3c5540856eda05e36a7b892..7a13b78059c5de57186f272d72dd9b4c072822c4 100644
--- a/chrome/browser/chromeos/extensions/virtual_keyboard_browsertest.cc
+++ b/chrome/browser/chromeos/extensions/virtual_keyboard_browsertest.cc
@@ -117,6 +117,10 @@ 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")));
 }