PPAPI: Add dev synchronous JS->Plugin messaging API

mojo/examples/pepper_container_app/plugin_instance.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "mojo/examples/pepper_container_app/plugin_instance.h"
 
 #include "base/logging.h"
 #include "mojo/examples/pepper_container_app/graphics_3d_resource.h"
 #include "mojo/examples/pepper_container_app/mojo_ppapi_globals.h"
 #include "ppapi/c/pp_errors.h"
@@ skipping 208 matching lines @@
 }
 
 void PluginInstance::StartTrackingLatency(PP_Instance instance) {
   NOTIMPLEMENTED();
 }
 
 void PluginInstance::PostMessage(PP_Instance instance, PP_Var message) {
   NOTIMPLEMENTED();
 }
 
+int32_t PluginInstance::RegisterMessageHandler(
+    PP_Instance instance,
+    void* user_data,
+    const PPP_MessageHandler_0_1* handler,
+    PP_Resource message_loop) {
+  NOTIMPLEMENTED();
+  return PP_ERROR_FAILED;
+}
+
+void PluginInstance::UnregisterMessageHandler(PP_Instance instance) {
+  NOTIMPLEMENTED();
+}
+
 PP_Bool PluginInstance::SetCursor(PP_Instance instance,
                                   PP_MouseCursor_Type type,
                                   PP_Resource image,
                                   const PP_Point* hot_spot) {
   NOTIMPLEMENTED();
   return PP_FALSE;
 }
 
 int32_t PluginInstance::LockMouse(
     PP_Instance instance,
@@ skipping 140 matching lines @@
 }
 
 PP_Var PluginInstance::GetPluginReferrerURL(PP_Instance instance,
                                             PP_URLComponents_Dev* components) {
   NOTIMPLEMENTED();
   return PP_MakeUndefined();
 }
 
 }  // namespace examples
 }  // namespace mojo