Replace multi-value keyboard flags with single value flag types.

ash/virtual_keyboard_controller_unittest.cc

Index: ash/virtual_keyboard_controller_unittest.cc
diff --git a/ash/virtual_keyboard_controller_unittest.cc b/ash/virtual_keyboard_controller_unittest.cc
index c31c6d0424690f8de2d6f129da49a0b359534f04..f7a59ef7e72b1b5f28e7cf1ed7a710ca81ac26a0 100644
--- a/ash/virtual_keyboard_controller_unittest.cc
+++ b/ash/virtual_keyboard_controller_unittest.cc
@@ -51,8 +51,8 @@ class VirtualKeyboardControllerTest : public AshTestBase {
   }
 
   void SetUp() override {
-    base::CommandLine::ForCurrentProcess()->AppendSwitchASCII(
-        keyboard::switches::kSmartVirtualKeyboard, "disabled");
+    base::CommandLine::ForCurrentProcess()->AppendSwitch(
+        keyboard::switches::kDisableSmartVirtualKeyboard);
     AshTestBase::SetUp();
     UpdateKeyboardDevices(std::vector<ui::KeyboardDevice>());
     UpdateTouchscreenDevices(std::vector<ui::TouchscreenDevice>());