A proposal and implementation for an initial postMessage interface. These in...

ppapi/cpp/module.cc

Index: ppapi/cpp/module.cc
===================================================================
--- ppapi/cpp/module.cc	(revision 78988)
+++ ppapi/cpp/module.cc	(working copy)
@@ -25,6 +25,7 @@
 
 #include <string.h>
 
+#include "ppapi/c/dev/ppp_messaging_dev.h"
 #include "ppapi/c/pp_instance.h"
 #include "ppapi/c/pp_var.h"
 #include "ppapi/c/ppp_instance.h"
@@ -134,6 +135,20 @@
   &Instance_GetInstanceObject
 };
 
+void Messaging_HandleMessage(PP_Instance pp_instance, PP_Var var) {
+  Module* module_singleton = Module::Get();
+  if (!module_singleton)
+    return;
+  Instance* instance = module_singleton->InstanceForPPInstance(pp_instance);
+  if (!instance)
+    return;
+  instance->HandleMessage(Var(Var::PassRef(), var));
+}
+
+static PPP_Messaging_Dev instance_messaging_interface = {
+  &Messaging_HandleMessage
+};
+
 // Module ----------------------------------------------------------------------
 
 Module::Module() : pp_module_(0), get_browser_interface_(NULL), core_(NULL) {
@@ -152,6 +167,9 @@
   if (strcmp(interface_name, PPP_INSTANCE_INTERFACE) == 0)
     return &instance_interface;
 
+  if (strcmp(interface_name, PPP_MESSAGING_DEV_INTERFACE) == 0)
+    return &instance_messaging_interface;
+
   // Now see if anything was dynamically registered.
   InterfaceMap::const_iterator found = additional_interfaces_.find(
       std::string(interface_name));