Convert NaCl renderer-browser messages to mojo.

components/nacl/browser/nacl_file_host.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.
 
 #ifndef COMPONENTS_NACL_BROWSER_NACL_FILE_HOST_H_
 #define COMPONENTS_NACL_BROWSER_NACL_FILE_HOST_H_
 
 #include <string>
 
-#include "base/memory/ref_counted.h"
+#include "components/nacl/common/nacl.mojom.h"
 
 class GURL;
 
 namespace base {
 class FilePath;
 }
 
-namespace IPC {
-class Message;
-}
-
-namespace nacl {
-class NaClHostMessageFilter;
-}
-
 // Opens NaCl Files in the Browser process, on behalf of the NaCl plugin.
 
 namespace nacl_file_host {
 
+using OpenFileCallback =
+    base::Callback<void(base::File, uint64_t token_lo, uint64_t token_hi)>;
+
 // Open a PNaCl file (readonly) on behalf of the NaCl plugin.
 // If it is executable, registers the executable for validation caching.
 // Otherwise, just opens the file read-only.
-void GetReadonlyPnaclFd(
-    scoped_refptr<nacl::NaClHostMessageFilter> nacl_host_message_filter,
-    const std::string& filename,
-    bool is_executable,
-    IPC::Message* reply_msg);
+void GetReadonlyPnaclFd(const std::string& filename,
+                        bool is_executable,
+                        const OpenFileCallback& callback);
 
 // Return true if the filename requested is valid for opening.
 // Sets file_to_open to the base::FilePath which we will attempt to open.
 bool PnaclCanOpenFile(const std::string& filename,
                       base::FilePath* file_to_open);
 
 // Opens a NaCl executable file for reading and executing.
 void OpenNaClExecutable(
-    scoped_refptr<nacl::NaClHostMessageFilter> nacl_host_message_filter,
     int render_view_id,
     const GURL& file_url,
     bool enable_validation_caching,
-    IPC::Message* reply_msg);
+    int render_process_id,
+    const base::FilePath& profile_directory,
+    const scoped_refptr<base::TaskRunner>& origin_task_runner,

[tibell, 2017/01/31 01:24:12]

Could you document what |origin_task_runner| is for (e.g. you have to call
|callbacl on it)?

[Sam McNally, 2017/02/07 00:13:18]

Done.

+    const OpenFileCallback& callback);
 
 }  // namespace nacl_file_host
 
 #endif  // COMPONENTS_NACL_BROWSER_NACL_FILE_HOST_H_