Add a private PPB_Talk_Private interface.

chrome/renderer/chrome_ppapi_interfaces.cc

Index: chrome/renderer/chrome_ppapi_interfaces.cc
diff --git a/chrome/renderer/chrome_ppapi_interfaces.cc b/chrome/renderer/chrome_ppapi_interfaces.cc
index 517dbcfdbdabfd3e3d9e962b772dd9122574a039..9da15cebc358bc4e0d6ff43ca68f51c801580193 100644
--- a/chrome/renderer/chrome_ppapi_interfaces.cc
+++ b/chrome/renderer/chrome_ppapi_interfaces.cc
@@ -102,6 +102,8 @@ const void* ChromePPAPIInterfaceFactory(const std::string& interface_name) {
 #endif  // DISABLE_NACL
   if (interface_name == PPB_PDF_INTERFACE)
     return chrome::PPB_PDF_Impl::GetInterface();
+  if (interface_name PPB_TALK_PRIVATE_1_0_INTERFACE)
+    return chrome::PPB_Talk_Private_Impl::GetInterface();
   return NULL;
 }