Add API stubs for GCD device commands.

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 1d2b2ce4772114ecb3de118ffa153367371c6989..dfa1911d7514deaa16396228f426ae3b049f7790 100644
--- a/chrome/common/extensions/api/gcd_private.idl
+++ b/chrome/common/extensions/api/gcd_private.idl
@@ -36,6 +36,9 @@ namespace gcdPrivate {
   };
 
   callback CloudDeviceListCallback = void(GCDDevice[] devices);
+  callback CommandDefsCallback = void(object commandDefs);
+  callback CommandCallback = void(object command);
+  callback CommandListCallback = void(object[] commands);
 
   interface Functions {
     static void getCloudDeviceList(CloudDeviceListCallback callback);
@@ -71,6 +74,27 @@ namespace gcdPrivate {
     // starting new registration.
     // |setupId| is a value returned by |setupStart|.
     static void setupStop(long setupId);
+
+    // Returns command definitions.
+    static void getCommandDefs(GCDDevice device, CommandDefsCallback callback);

[alexsemenov, 2014/07/02 18:17:25]

Let's rename to getCommandDefinitions and CommandDefinitionsCallback

[Vitaly Buka (NO REVIEWS), 2014/07/02 22:20:00]

Done.

+
+    static void insertCommand(GCDDevice device,
+                              long expireInMs,
+                              long responseAwaitMs,

[alexsemenov, 2014/07/02 18:17:25]

Only need expiration time

[Vitaly Buka (NO REVIEWS), 2014/07/02 22:20:00]

Done.

+                              object command,
+                              CommandDefsCallback callback);

[alexsemenov, 2014/07/02 18:17:26]

Same here: CommandDefinitionsCallback

[alexsemenov, 2014/07/02 18:17:26]

CommandDefsCallback -> CommandCallback here?

[Vitaly Buka (NO REVIEWS), 2014/07/02 22:20:01]

Done.

+
+    static void getCommand(DOMString commandId,
+                           DOMString mediaPath,

[alexsemenov, 2014/07/02 18:17:25]

Let's remove mediaPath for now

[Vitaly Buka (NO REVIEWS), 2014/07/02 22:20:01]

Done.

+                           CommandCallback callback);
+
+    static void cancelCommand(DOMString commandId,
+                              CommandCallback callback);
+
+    static void getCommandsList(GCDDevice device,
+                                DOMString byUser,
+                                DOMString state,
+                                CommandListCallback callback);
   };
 
   interface Events {