A proposal for an initial postMessage interface. This will allow JavaScript ...

ppapi/cpp/instance.cc

Index: ppapi/cpp/instance.cc
===================================================================
--- ppapi/cpp/instance.cc	(revision 77426)
+++ ppapi/cpp/instance.cc	(working copy)
@@ -61,6 +61,10 @@
   return false;
 }
 
+void Instance::HandleMessage(const Var& /*message_data*/) {
+  return;
+}
+
 Var Instance::GetInstanceObject() {
   return Var();
 }
@@ -115,6 +119,12 @@
                  Var::OutException(exception).get()));
 }
 
+void Instance::PostMessage(const Var& message) {
+  if (!has_interface<PPB_Instance>())
+    return;
+  get_interface<PPB_Instance>()->PostMessage(pp_instance(), message.pp_var());
+}
+
 void Instance::AddPerInstanceObject(const std::string& interface_name,
                                     void* object) {
   // Ensure we're not trying to register more than one object per interface