make base::SharedMemoryHandle a class on POSIX.

mojo/edk/system/platform_wrapper_unittest.cc

 // 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.
 
 #include <stdint.h>
 #include <string.h>
 
 #include <algorithm>
 #include <string>
 #include <vector>
@@ skipping 107 matching lines @@
     // Wrap the shared memory handle and send it to the child along with the
     // expected message.
     base::SharedMemoryHandle memory_handle =
         base::SharedMemory::DuplicateHandle(buffer.handle());
     MojoPlatformHandle os_buffer;
     os_buffer.struct_size = sizeof(MojoPlatformHandle);
     os_buffer.type = SHARED_BUFFER_PLATFORM_HANDLE_TYPE;
 #if defined(OS_MACOSX) && !defined(OS_IOS)
     os_buffer.value = static_cast<uint64_t>(memory_handle.GetMemoryObject());
 #elif defined(OS_POSIX)
-    os_buffer.value = static_cast<uint64_t>(memory_handle.fd);
+    os_buffer.value = static_cast<uint64_t>(memory_handle.GetHandle());
 #elif defined(OS_WIN)
     os_buffer.value = reinterpret_cast<uint64_t>(memory_handle.GetHandle());
 #endif
 
     MojoHandle wrapped_handle;
     ASSERT_EQ(MOJO_RESULT_OK,
               MojoWrapPlatformSharedBufferHandle(
                   &os_buffer, kMessage.size(),
                   MOJO_PLATFORM_SHARED_BUFFER_HANDLE_FLAG_NONE,
                   &wrapped_handle));
@@ skipping 22 matching lines @@
   bool read_only = flags & MOJO_PLATFORM_SHARED_BUFFER_HANDLE_FLAG_NONE;
   EXPECT_FALSE(read_only);
 
 #if defined(OS_MACOSX) && !defined(OS_IOS)
   ASSERT_EQ(MOJO_PLATFORM_HANDLE_TYPE_MACH_PORT, os_buffer.type);
   base::SharedMemoryHandle memory_handle(
       static_cast<mach_port_t>(os_buffer.value), size,
       base::GetCurrentProcId());
 #elif defined(OS_POSIX)
   ASSERT_EQ(MOJO_PLATFORM_HANDLE_TYPE_FILE_DESCRIPTOR, os_buffer.type);
-  base::SharedMemoryHandle memory_handle(static_cast<int>(os_buffer.value),
-                                         false);
+  base::SharedMemoryHandle memory_handle(
+      base::FileDescriptor(static_cast<int>(os_buffer.value), false));
 #elif defined(OS_WIN)
   ASSERT_EQ(MOJO_PLATFORM_HANDLE_TYPE_WINDOWS_HANDLE, os_buffer.type);
   base::SharedMemoryHandle memory_handle(
       reinterpret_cast<HANDLE>(os_buffer.value), base::GetCurrentProcId());
 #endif
 
   base::SharedMemory memory(memory_handle, read_only);
   memory.Map(message.size());
   ASSERT_TRUE(memory.memory());
 
@@ skipping 20 matching lines @@
   MojoHandle wrapped_handle;
   MojoPlatformHandle platform_handle;
   platform_handle.struct_size = 0;
   EXPECT_EQ(MOJO_RESULT_INVALID_ARGUMENT,
             MojoWrapPlatformHandle(&platform_handle, &wrapped_handle));
 }
 
 }  // namespace
 }  // namespace edk
 }  // namespace mojo