Improve process launch handle sharing API.

content/browser/child_process_launcher_helper.h

 // 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.
 
 #ifndef CONTENT_BROWSER_CHILD_PROCESS_LAUNCHER_HELPER_H_
 #define CONTENT_BROWSER_CHILD_PROCESS_LAUNCHER_HELPER_H_
 
 #include <memory>
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/process/kill.h"
 #include "base/process/process.h"
 #include "build/build_config.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/common/result_codes.h"
 #include "mojo/edk/embedder/embedder.h"
 #include "mojo/edk/embedder/scoped_platform_handle.h"
 #include "services/catalog/public/cpp/manifest_parsing_util.h"
 
 #if defined(OS_ANDROID)
 #include "base/android/scoped_java_ref.h"
 #endif
 
 #if defined(OS_WIN)
 #include "sandbox/win/src/sandbox_types.h"
 #else
-#include "content/public/browser/file_descriptor_info.h"
+#include "content/public/browser/posix_file_descriptor_info.h"
 #endif
 
 #if defined(OS_LINUX)
 #include "content/public/common/zygote_handle.h"
 #endif
 
 #if defined(OS_MACOSX)
 #include "sandbox/mac/seatbelt_exec.h"
 #endif
 
 namespace base {
 class CommandLine;
 }
 
 namespace content {
 
 class ChildProcessLauncher;
-class FileDescriptorInfo;
 class SandboxedProcessLauncherDelegate;
 
+#if defined(OS_POSIX)
+class PosixFileDescriptorInfo;
+#endif
+
 namespace internal {
 
-
-#if defined(OS_WIN)
+#if defined(OS_POSIX)
+using FileMappedForLaunch = PosixFileDescriptorInfo;
+#else
 using FileMappedForLaunch = base::HandlesToInheritVector;
-#else
-using FileMappedForLaunch = FileDescriptorInfo;
 #endif
 
 // ChildProcessLauncherHelper is used by ChildProcessLauncher to start a
 // process. Since ChildProcessLauncher can be deleted by its client at any time,
 // this class is used to keep state as the process is started asynchronously.
 // It also contains the platform specific pieces.
 class ChildProcessLauncherHelper :
     public base::RefCountedThreadSafe<ChildProcessLauncherHelper> {
  public:
   // Abstraction around a process required to deal in a platform independent way
@@ skipping 143 matching lines @@
 #if defined(OS_ANDROID)
   base::android::ScopedJavaGlobalRef<jobject> java_peer_;
 #endif
 };
 
 }  // namespace internal
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_CHILD_PROCESS_LAUNCHER_HELPER_H_