Rename InterfaceID to ApiID and move the file.

ppapi/proxy/ppp_instance_private_proxy.cc

Index: ppapi/proxy/ppp_instance_private_proxy.cc
diff --git a/ppapi/proxy/ppp_instance_private_proxy.cc b/ppapi/proxy/ppp_instance_private_proxy.cc
index 82057a62d99ce2c12f1fc691754d64961808599a..75e9d60e131e85bbd2d3b485ea53c0218b9d5df1 100644
--- a/ppapi/proxy/ppp_instance_private_proxy.cc
+++ b/ppapi/proxy/ppp_instance_private_proxy.cc
@@ -22,7 +22,7 @@ PP_Var GetInstanceObject(PP_Instance instance) {
   Dispatcher* dispatcher = HostDispatcher::GetForInstance(instance);
   ReceiveSerializedVarReturnValue result;
   dispatcher->Send(new PpapiMsg_PPPInstancePrivate_GetInstanceObject(
-      INTERFACE_ID_PPP_INSTANCE_PRIVATE, instance, &result));
+      API_ID_PPP_INSTANCE_PRIVATE, instance, &result));
   return result.Return(dispatcher);
 }
 
@@ -53,7 +53,7 @@ const InterfaceProxy::Info* PPP_Instance_Private_Proxy::GetInfo() {
   static const Info info = {
     &instance_private_interface,
     PPP_INSTANCE_PRIVATE_INTERFACE,
-    INTERFACE_ID_PPP_INSTANCE_PRIVATE,
+    API_ID_PPP_INSTANCE_PRIVATE,
     false,
     &CreateInstancePrivateProxy,
   };