PPAPI/NaCl: Make NaClIPCAdapter transfer handles more generally

ppapi/proxy/ppb_graphics_3d_proxy.cc

 // Copyright (c) 2012 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 "ppapi/proxy/ppb_graphics_3d_proxy.h"
 
 #include "gpu/command_buffer/client/gles2_implementation.h"
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/proxy/enter_proxy.h"
 #include "ppapi/proxy/plugin_dispatcher.h"
@@ skipping 298 matching lines @@
     const HostResource& context,
     int32 id) {
   EnterHostFromHostResource<PPB_Graphics3D_API> enter(context);
   if (enter.succeeded())
     enter.object()->DestroyTransferBuffer(id);
 }
 
 void PPB_Graphics3D_Proxy::OnMsgGetTransferBuffer(
     const HostResource& context,
     int32 id,
-    base::SharedMemoryHandle* transfer_buffer,
-    uint32* size) {
-  *transfer_buffer = base::SharedMemory::NULLHandle();
-  *size = 0;
+    ppapi::proxy::SerializedHandle* transfer_buffer) {
+  transfer_buffer->set_null_shmem();
 
   EnterHostFromHostResource<PPB_Graphics3D_API> enter(context);
   int shm_handle = 0;
   uint32_t shm_size = 0;
   if (enter.succeeded() &&
       enter.object()->GetTransferBuffer(id, &shm_handle, &shm_size)) {
-    *transfer_buffer = TransportSHMHandleFromInt(dispatcher(), shm_handle);
-    *size = shm_size;
+    transfer_buffer->set_shmem(
+        TransportSHMHandleFromInt(dispatcher(), shm_handle),
+        shm_size);
   }
 }
 
 void PPB_Graphics3D_Proxy::OnMsgSwapBuffers(const HostResource& context) {
   EnterHostFromHostResourceForceCallback<PPB_Graphics3D_API> enter(
       context, callback_factory_,
       &PPB_Graphics3D_Proxy::SendSwapBuffersACKToPlugin, context);
   if (enter.succeeded())
     enter.SetResult(enter.object()->SwapBuffers(enter.callback()));
 }
 
 void PPB_Graphics3D_Proxy::OnMsgSwapBuffersACK(const HostResource& resource,
                                               int32_t pp_error) {
   EnterPluginFromHostResource<PPB_Graphics3D_API> enter(resource);
   if (enter.succeeded())
     static_cast<Graphics3D*>(enter.object())->SwapBuffersACK(pp_error);
 }
 
 void PPB_Graphics3D_Proxy::SendSwapBuffersACKToPlugin(
     int32_t result,
     const HostResource& context) {
   dispatcher()->Send(new PpapiMsg_PPBGraphics3D_SwapBuffersACK(
       API_ID_PPB_GRAPHICS_3D, context, result));
 }
 
 }  // namespace proxy
 }  // namespace ppapi