Add a private PPB_Talk_Private interface.

ppapi/proxy/ppapi_messages.h

Index: ppapi/proxy/ppapi_messages.h
diff --git a/ppapi/proxy/ppapi_messages.h b/ppapi/proxy/ppapi_messages.h
index dbcbbd1a16594470f6e07a10a035ed70cbb53de9..4c74eac66599f95e8838d8a1dac02cceef5fb21a 100644
--- a/ppapi/proxy/ppapi_messages.h
+++ b/ppapi/proxy/ppapi_messages.h
@@ -309,6 +309,13 @@ IPC_MESSAGE_ROUTED2(
     ppapi::HostResource /* filesystem */,
     int32_t /* result */)
 
+// PPB_Talk
+IPC_MESSAGE_ROUTED3(
+    PpapiMsg_PPBTalk_GetPermissionACK,
+    uint32 /* plugin_dispatcher_id */,
+    PP_Resource /* resource */,
+    int32_t /* result */)
+
 // PPB_TCPSocket_Private.
 IPC_MESSAGE_ROUTED5(PpapiMsg_PPBTCPSocket_ConnectACK,
                     uint32 /* plugin_dispatcher_id */,
@@ -926,6 +933,12 @@ IPC_SYNC_MESSAGE_ROUTED2_1(
     uint32_t /* table */,
     std::string /* result */)
 
+// PPB_Talk.
+IPC_MESSAGE_ROUTED2(
+    PpapiHostMsg_PPBTalk_GetPermission,
+    uint32 /* plugin_dispatcher_id */,
+    PP_Resource /* resource */)
+
 // PPB_Testing.
 IPC_SYNC_MESSAGE_ROUTED3_1(
     PpapiHostMsg_PPBTesting_ReadImageData,