Add queryForNewLocalDevices to gcdPrivate

chrome/common/extensions/api/gcd_private.idl

Index: chrome/common/extensions/api/gcd_private.idl
diff --git a/chrome/common/extensions/api/gcd_private.idl b/chrome/common/extensions/api/gcd_private.idl
index 26f57e042b57d8fbaaf28d7b01a6b7c9bd0a5632..7d0ff1337b66c5d80d62c4589d1093eb811b85ec 100644
--- a/chrome/common/extensions/api/gcd_private.idl
+++ b/chrome/common/extensions/api/gcd_private.idl
@@ -40,6 +40,11 @@ namespace gcdPrivate {
   interface Functions {
     static void getCloudDeviceList(CloudDeviceListCallback callback);
 
+    // Call this function *only* after registering for onDeviceStateChanged
+    // events, or it will do nothing. This will trigger an
+    // onLocalDeviceStateChanged event per device.
+    static void queryForNewLocalDevices();
+
     // Starts device setup process. Returns id of setup process. Id should be
     // used as |setupId| in all subsequent setup related calls, and for
     // filtering setup events.