make base::SharedMemoryHandle a class on POSIX.

components/exo/wayland/clients/client_base.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 "components/exo/wayland/clients/client_base.h"
 
 #include <fcntl.h>
 #include <linux-dmabuf-unstable-v1-client-protocol.h>
 #include <presentation-time-client-protocol.h>
 #include <wayland-client-core.h>
@@ skipping 432 matching lines @@
     buffer->sk_surface = SkSurface::MakeFromBackendTextureAsRenderTarget(
         gr_context_.get(), desc, nullptr);
     DCHECK(buffer->sk_surface);
     return buffer;
   }
 #endif
 
   size_t stride = width_ * kBytesPerPixel;
   buffer->shared_memory.reset(new base::SharedMemory());
   buffer->shared_memory->CreateAndMapAnonymous(stride * height_);
-  buffer->shm_pool.reset(
-      wl_shm_create_pool(globals_.shm.get(), buffer->shared_memory->handle().fd,
-                         buffer->shared_memory->requested_size()));
+  buffer->shm_pool.reset(wl_shm_create_pool(
+      globals_.shm.get(), buffer->shared_memory->handle().GetHandle(),
+      buffer->shared_memory->requested_size()));
 
   buffer->buffer.reset(static_cast<wl_buffer*>(wl_shm_pool_create_buffer(
       buffer->shm_pool.get(), 0, width_, height_, stride, kShmFormat)));
   if (!buffer->buffer) {
     LOG(ERROR) << "Can't create buffer";
     return nullptr;
   }
 
   buffer->sk_surface = SkSurface::MakeRasterDirect(
       SkImageInfo::Make(width_, height_, kColorType, kOpaque_SkAlphaType),
       static_cast<uint8_t*>(buffer->shared_memory->memory()), stride);
   DCHECK(buffer->sk_surface);
   return buffer;
 }
 
 }  // namespace clients
 }  // namespace wayland
 }  // namespace exo