Pass file Regions along with FDs to child processes on Android

content/browser/child_process_launcher.cc

 // 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.
 
 #include "content/browser/child_process_launcher.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/files/file_util.h"
 #include "base/logging.h"
@@ skipping 126 matching lines @@
   files_to_register->Share(kPrimaryIPCChannel, ipcfd.get());
 #else
   files_to_register->Transfer(kPrimaryIPCChannel, ipcfd.Pass());
 #endif
 #endif
 
 #if defined(OS_ANDROID)
   // Android WebView runs in single process, ensure that we never get here
   // when running in single process mode.
   CHECK(!cmd_line->HasSwitch(switches::kSingleProcess));
-
+  std::map<int, base::MemoryMappedFile::Region> regions;
   GetContentClient()->browser()->GetAdditionalMappedFilesForChildProcess(
       *cmd_line, child_process_id, files_to_register.get());
 
   StartChildProcess(
-      cmd_line->argv(), child_process_id, files_to_register.Pass(),
+      cmd_line->argv(), child_process_id, files_to_register.Pass(), regions,
       base::Bind(&OnChildProcessStartedAndroid, callback, client_thread_id,
                  begin_launch_time, base::Passed(&ipcfd)));
 
 #elif defined(OS_POSIX)
   // We need to close the client end of the IPC channel to reliably detect
   // child termination.
 
 #if !defined(OS_MACOSX)
   GetContentClient()->browser()->GetAdditionalMappedFilesForChildProcess(
       *cmd_line, child_process_id, files_to_register.get());
@@ skipping 330 matching lines @@
 }
 
 ChildProcessLauncher::Client* ChildProcessLauncher::ReplaceClientForTest(
     Client* client) {
   Client* ret = client_;
   client_ = client;
   return ret;
 }
 
 }  // namespace content