Add an IPC channel between the NaCl loader process and the renderer.

chrome/common/nacl_messages.h

 // Copyright (c) 2012 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.
 
 // Defines messages between the browser and NaCl process.
 
 // Multiply-included message file, no traditional include guard.
 #include "base/process.h"
 #include "chrome/common/nacl_types.h"
+#include "ipc/ipc_channel_handle.h"
 #include "ipc/ipc_message_macros.h"
 
 #define IPC_MESSAGE_START NaClMsgStart
 
 IPC_STRUCT_TRAITS_BEGIN(nacl::NaClStartParams)
   IPC_STRUCT_TRAITS_MEMBER(handles)
   IPC_STRUCT_TRAITS_MEMBER(validation_cache_key)
   IPC_STRUCT_TRAITS_MEMBER(version)
   IPC_STRUCT_TRAITS_MEMBER(enable_exception_handling)
 IPC_STRUCT_TRAITS_END()
@@ skipping 42 matching lines @@
 // Used by the NaCl process to query a database in the browser.  The database
 // contains the signatures of previously validated code chunks.
 IPC_SYNC_MESSAGE_CONTROL1_1(NaClProcessMsg_QueryKnownToValidate,
                             std::string, /* A validation signature */
                             bool /* Can validation be skipped? */)
 
 // Used by the NaCl process to add a validation signature to the validation
 // database in the browser.
 IPC_MESSAGE_CONTROL1(NaClProcessMsg_SetKnownToValidate,
                      std::string /* A validation signature */)
+
+// Notify the browser process that the server side of the PPAPI channel was
+// created successfully.
+IPC_MESSAGE_CONTROL1(NaClProcessHostMsg_PpapiChannelCreated,
+                     IPC::ChannelHandle /* channel_handle */)