Files required by a service now listed in manifest.

content/browser/child_process_launcher_helper_mac.cc

 // Copyright 2017 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 "base/memory/ptr_util.h"
+#include "base/path_service.h"
 #include "base/posix/global_descriptors.h"
 #include "content/browser/bootstrap_sandbox_manager_mac.h"
 #include "content/browser/child_process_launcher.h"
 #include "content/browser/child_process_launcher_helper.h"
 #include "content/browser/child_process_launcher_helper_posix.h"
 #include "content/browser/mach_broker_mac.h"
 #include "content/public/common/result_codes.h"
 #include "content/public/common/sandboxed_process_launcher_delegate.h"
 #include "mojo/edk/embedder/scoped_platform_handle.h"
 #include "sandbox/mac/bootstrap_sandbox.h"
@@ skipping 123 matching lines @@
   base::EnsureProcessTerminated(std::move(process.process));
 }
 
 // static
 void ChildProcessLauncherHelper::SetProcessBackgroundedOnLauncherThread(
       base::Process process, bool background) {
   if (process.CanBackgroundProcesses())
     process.SetProcessBackgrounded(MachBroker::GetInstance(), background);
 }
 
+// static
+base::File ChildProcessLauncherHelper::OpenFile(
+    const base::FilePath& path,
+    base::MemoryMappedFile::Region* region) {
+  base::FilePath exe_dir;
+  bool result = base::PathService::Get(base::BasePathKey::DIR_EXE, &exe_dir);
+  DCHECK(result);
+  base::File file(exe_dir.Append(path),
+                  base::File::FLAG_OPEN | base::File::FLAG_READ);
+  *region = base::MemoryMappedFile::Region::kWholeFile;
+  return file;
+}
+
 }  //  namespace internal
 }  // namespace content