Define kInvalidPlatformFile in base

mojo/public/cpp/system/platform_handle.h

 // Copyright 2016 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.
 
 // This file provides a C++ wrapping around the Mojo C API for platform handles,
 // replacing the prefix of "Mojo" with a "mojo" namespace.
 //
 // Please see "mojo/public/c/system/platform_handle.h" for complete
 // documentation of the API.
 
@@ skipping 12 matching lines @@
 #include "mojo/public/cpp/system/buffer.h"
 #include "mojo/public/cpp/system/handle.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
 #endif
 
 namespace mojo {
 
 #if defined(OS_POSIX)
-
 const MojoPlatformHandleType kPlatformFileHandleType =
     MOJO_PLATFORM_HANDLE_TYPE_FILE_DESCRIPTOR;
-const base::PlatformFile kInvalidPlatformFile = -1;
 
 #if defined(OS_MACOSX) && !defined(OS_IOS)
 const MojoPlatformHandleType kPlatformSharedBufferHandleType =
     MOJO_PLATFORM_HANDLE_TYPE_MACH_PORT;
 #else
 const MojoPlatformHandleType kPlatformSharedBufferHandleType =
     MOJO_PLATFORM_HANDLE_TYPE_FILE_DESCRIPTOR;
 #endif  // defined(OS_MACOSX) && !defined(OS_IOS)
 
 #elif defined(OS_WIN)
 const MojoPlatformHandleType kPlatformFileHandleType =
     MOJO_PLATFORM_HANDLE_TYPE_WINDOWS_HANDLE;
-const base::PlatformFile kInvalidPlatformFile = INVALID_HANDLE_VALUE;
 
 const MojoPlatformHandleType kPlatformSharedBufferHandleType =
     MOJO_PLATFORM_HANDLE_TYPE_WINDOWS_HANDLE;
 #endif  // defined(OS_POSIX)
 
 // Wraps a PlatformFile as a Mojo handle. Takes ownership of the file object.
 ScopedHandle WrapPlatformFile(base::PlatformFile platform_file);
 
 // Unwraps a PlatformFile from a Mojo handle.
 MojoResult UnwrapPlatformFile(ScopedHandle handle, base::PlatformFile* file);
@@ skipping 10 matching lines @@
 // Unwraps a base::SharedMemoryHandle from a Mojo handle. The caller assumes
 // responsibility for the lifetime of the SharedMemoryHandle.
 MojoResult UnwrapSharedMemoryHandle(ScopedSharedBufferHandle handle,
                                     base::SharedMemoryHandle* memory_handle,
                                     size_t* size,
                                     bool* read_only);
 
 }  // namespace mojo
 
 #endif  // MOJO_PUBLIC_CPP_SYSTEM_PLATFORM_HANDLE_H_