Provide skeleton for ChromeVox next.

chromeos/chromeos_switches.cc

Index: chromeos/chromeos_switches.cc
diff --git a/chromeos/chromeos_switches.cc b/chromeos/chromeos_switches.cc
index 91c825f4d5c9ad19835ecc86ce6ba01d21404661..7b83453a39ab07a70d785ff811d414747f840b0c 100644
--- a/chromeos/chromeos_switches.cc
+++ b/chromeos/chromeos_switches.cc
@@ -68,6 +68,10 @@ const char kEchoExtensionPath[]             = "echo-ext-path";
 // Enables switching between different cellular carriers from the UI.
 const char kEnableCarrierSwitching[]        = "enable-carrier-switching";
 
+// Enables the next generation version of ChromeVox. Only valid with
+// use_chromevox_next=1 within your GYP_DEFINES.
+const char kEnableChromeVoxNext[]           = "enable-chromevox-next";
+
 // Enables consumer management, which allows user to enroll, remotely lock and
 // locate the device.
 const char kEnableConsumerManagement[]      = "enable-consumer-management";