Convert NaCl renderer-browser messages to mojo.

components/nacl/renderer/pnacl_translation_resource_host.cc

 // Copyright 2013 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 "pnacl_translation_resource_host.h"
 
-#include "base/single_thread_task_runner.h"
-#include "components/nacl/common/nacl_host_messages.h"
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/shared_impl/ppapi_globals.h"
 
 using ppapi::PpapiGlobals;
 
-PnaclTranslationResourceHost::PnaclTranslationResourceHost(
-    scoped_refptr<base::SingleThreadTaskRunner> io_task_runner)
-    : io_task_runner_(io_task_runner), sender_(NULL) {
+namespace {
+
+void OnNexeTempFileReply(
+    const PnaclTranslationResourceHost::RequestNexeFdCallback& callback,
+    PP_Instance instance,
+    base::File file,
+    bool is_hit) {
+  DCHECK(PpapiGlobals::Get()
+             ->GetMainThreadMessageLoop()
+             ->BelongsToCurrentThread());
+
+  callback.Run(instance, is_hit, file.TakePlatformFile());
 }
 
-PnaclTranslationResourceHost::~PnaclTranslationResourceHost() {
-  DCHECK(io_task_runner_->BelongsToCurrentThread());
-  CleanupCacheRequests();
+}  // namespace
+
+PnaclTranslationResourceHost::PnaclTranslationResourceHost(
+    nacl::mojom::NaClHost* host)
+    : host_(host) {
+  DCHECK(host_);
 }
 
-void PnaclTranslationResourceHost::OnFilterAdded(IPC::Channel* channel) {
-  DCHECK(io_task_runner_->BelongsToCurrentThread());
-  sender_ = channel;
-}
-
-void PnaclTranslationResourceHost::OnFilterRemoved() {
-  DCHECK(io_task_runner_->BelongsToCurrentThread());
-  sender_ = NULL;
-}
-
-void PnaclTranslationResourceHost::OnChannelClosing() {
-  DCHECK(io_task_runner_->BelongsToCurrentThread());
-  sender_ = NULL;
-}
-
-bool PnaclTranslationResourceHost::OnMessageReceived(
-    const IPC::Message& message) {
-  DCHECK(io_task_runner_->BelongsToCurrentThread());
-  bool handled = true;
-  IPC_BEGIN_MESSAGE_MAP(PnaclTranslationResourceHost, message)
-    IPC_MESSAGE_HANDLER(NaClViewMsg_NexeTempFileReply, OnNexeTempFileReply)
-    IPC_MESSAGE_UNHANDLED(handled = false)
-  IPC_END_MESSAGE_MAP()
-  return handled;
-}
+PnaclTranslationResourceHost::~PnaclTranslationResourceHost() = default;
 
 void PnaclTranslationResourceHost::RequestNexeFd(
     int render_view_id,
     PP_Instance instance,
     const nacl::PnaclCacheInfo& cache_info,
     RequestNexeFdCallback callback) {
-  DCHECK(PpapiGlobals::Get()->
-         GetMainThreadMessageLoop()->BelongsToCurrentThread());
-  io_task_runner_->PostTask(
-      FROM_HERE,
-      base::Bind(&PnaclTranslationResourceHost::SendRequestNexeFd, this,
-                 render_view_id, instance, cache_info, callback));
-  return;
-}
-
-void PnaclTranslationResourceHost::SendRequestNexeFd(
-    int render_view_id,
-    PP_Instance instance,
-    const nacl::PnaclCacheInfo& cache_info,
-    RequestNexeFdCallback callback) {
-  DCHECK(io_task_runner_->BelongsToCurrentThread());
-  if (!sender_ || !sender_->Send(new NaClHostMsg_NexeTempFileRequest(
-          render_view_id, instance, cache_info))) {
-    PpapiGlobals::Get()->GetMainThreadMessageLoop()->PostTask(
-        FROM_HERE,
-        base::Bind(callback,
-                   static_cast<int32_t>(PP_ERROR_FAILED),
-                   false,
-                   PP_kInvalidFileHandle));
-    return;
-  }
-  pending_cache_requests_.insert(std::make_pair(instance, callback));
+  DCHECK(PpapiGlobals::Get()
+             ->GetMainThreadMessageLoop()
+             ->BelongsToCurrentThread());
+  host_->NexeTempFileRequest(render_view_id, instance, cache_info,
+                             base::Bind(&OnNexeTempFileReply, callback));
 }
 
 void PnaclTranslationResourceHost::ReportTranslationFinished(
     PP_Instance instance,
     PP_Bool success) {
   DCHECK(PpapiGlobals::Get()->
          GetMainThreadMessageLoop()->BelongsToCurrentThread());
-  io_task_runner_->PostTask(
-      FROM_HERE,
-      base::Bind(&PnaclTranslationResourceHost::SendReportTranslationFinished,
-                 this, instance, success));
-  return;
+  host_->ReportTranslationFinished(instance, PP_ToBool(success));
 }
-
-void PnaclTranslationResourceHost::SendReportTranslationFinished(
-    PP_Instance instance,
-    PP_Bool success) {
-  DCHECK(io_task_runner_->BelongsToCurrentThread());
-  // If the sender is closed or we have been detached, we are probably shutting
-  // down, so just don't send anything.
-  if (!sender_)
-    return;
-  DCHECK(pending_cache_requests_.count(instance) == 0);
-  sender_->Send(new NaClHostMsg_ReportTranslationFinished(instance,
-                                                          PP_ToBool(success)));
-}
-
-void PnaclTranslationResourceHost::OnNexeTempFileReply(
-    PP_Instance instance,
-    bool is_hit,
-    IPC::PlatformFileForTransit file) {
-  DCHECK(io_task_runner_->BelongsToCurrentThread());
-  base::File base_file = IPC::PlatformFileForTransitToFile(file);
-  CacheRequestInfoMap::iterator it = pending_cache_requests_.find(instance);
-  if (!base_file.IsValid()) {
-    DLOG(ERROR) << "Got invalid platformfilefortransit";
-  }
-  if (it != pending_cache_requests_.end()) {
-    PP_FileHandle file_handle = PP_kInvalidFileHandle;
-    int32_t status = PP_ERROR_FAILED;
-    if (base_file.IsValid()) {
-      file_handle = base_file.TakePlatformFile();
-      status = PP_OK;
-    }
-    PpapiGlobals::Get()->GetMainThreadMessageLoop()->PostTask(
-        FROM_HERE,
-        base::Bind(it->second, status, is_hit, file_handle));
-    pending_cache_requests_.erase(it);
-  } else {
-    DLOG(ERROR) << "Could not find pending request for reply";
-  }
-}
-
-void PnaclTranslationResourceHost::CleanupCacheRequests() {
-  DCHECK(io_task_runner_->BelongsToCurrentThread());
-  for (CacheRequestInfoMap::iterator it = pending_cache_requests_.begin();
-       it != pending_cache_requests_.end();
-       ++it) {
-    PpapiGlobals::Get()->GetMainThreadMessageLoop()->PostTask(
-        FROM_HERE,
-        base::Bind(it->second,
-                   static_cast<int32_t>(PP_ERROR_ABORTED),
-                   false,
-                   PP_kInvalidFileHandle));
-  }
-  pending_cache_requests_.clear();
-}