Move smart deploy to tristate.

BUG=

Review URL: https://codereview.chromium.org/1149383006

Cr-Commit-Position: refs/heads/master@{#333058}
diff --git a/ash/virtual_keyboard_controller.cc b/ash/virtual_keyboard_controller.cc
index 2f46e5c..d6fa180e 100644
--- a/ash/virtual_keyboard_controller.cc
+++ b/ash/virtual_keyboard_controller.cc
@@ -28,8 +28,7 @@
           keyboard::switches::kEnableVirtualKeyboard)) {
     return false;
   }
-  return !base::CommandLine::ForCurrentProcess()->HasSwitch(
-      keyboard::switches::kDisableSmartVirtualKeyboard);
+  return keyboard::IsSmartDeployEnabled();
 }
 
 }  // namespace