Add IPC Channel for new ManifestService.

ppapi/nacl_irt/plugin_startup.cc

Index: ppapi/nacl_irt/plugin_startup.cc
diff --git a/ppapi/nacl_irt/plugin_startup.cc b/ppapi/nacl_irt/plugin_startup.cc
index a3b5bc207e67acd95aab07893815941e4d7eeda1..4a7853f73f251755763e25a38d3c7ebfc7628dc3 100644
--- a/ppapi/nacl_irt/plugin_startup.cc
+++ b/ppapi/nacl_irt/plugin_startup.cc
@@ -2,28 +2,55 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#include "ppapi/nacl_irt/plugin_startup.h"
+
+#include "base/bind.h"
+#include "base/file_descriptor_posix.h"
 #include "base/logging.h"
 #include "base/synchronization/waitable_event.h"
 #include "base/threading/thread.h"
-#include "ppapi/nacl_irt/plugin_startup.h"
+#include "ipc/ipc_channel_handle.h"
+#include "ppapi/nacl_irt/embedder_service.h"
 
 namespace ppapi {
 namespace {
 
 int g_nacl_browser_ipc_fd = -1;
 int g_nacl_renderer_ipc_fd = -1;
+int g_embedder_service_fd = -1;
 
 base::WaitableEvent* g_shutdown_event = NULL;
 base::Thread* g_io_thread = NULL;
+EmbedderService* g_embedder_service = NULL;
+
+void StartUpEmbedderServiceOnIOThread(base::WaitableEvent* event) {
+  // The start up must be called only once.
+  DCHECK(!g_embedder_service);
+  // embedder_service_fd must be set.
+  DCHECK_NE(g_embedder_service_fd, -1);
+  // IOThread and shutdown event must be initialized in advance.
+  DCHECK(g_io_thread);
+  DCHECK(g_shutdown_event);
+
+  g_embedder_service = new EmbedderService(
+      IPC::ChannelHandle(
+          "NaCl IPC", base::FileDescriptor(g_embedder_service_fd, false)),
+      g_io_thread->message_loop_proxy(),
+      g_shutdown_event);
+  event->Signal();
+}
 
 }  // namespace
 
-void SetIPCFileDescriptors(int browser_ipc_fd, int renderer_ipc_fd) {
+void SetIPCFileDescriptors(
+    int browser_ipc_fd, int renderer_ipc_fd, int embedder_service_fd) {
   // The initialization must be only once.
   DCHECK_EQ(g_nacl_browser_ipc_fd, -1);
   DCHECK_EQ(g_nacl_renderer_ipc_fd, -1);
+  DCHECK_EQ(g_embedder_service_fd, -1);
   g_nacl_browser_ipc_fd = browser_ipc_fd;
   g_nacl_renderer_ipc_fd = renderer_ipc_fd;
+  g_embedder_service_fd = embedder_service_fd;
 }
 
 void StartUpPlugin() {
@@ -35,6 +62,17 @@ void StartUpPlugin() {
   g_io_thread = new base::Thread("Chrome_NaClIOThread");
   g_io_thread->StartWithOptions(
       base::Thread::Options(base::MessageLoop::TYPE_IO, 0));
+
+  if (g_embedder_service_fd != -1) {
+    // EmbedderService must be created on IOThread so that the main message
+    // handling will be done on the thread, which has a message loop
+    // even before irt_ppapi_start invocation.
+    base::WaitableEvent event(true, false);
+    g_io_thread->message_loop_proxy()->PostTask(
+        FROM_HERE,
+        base::Bind(StartUpEmbedderServiceOnIOThread, &event));
+    event.Wait();
+  }
 }
 
 int GetBrowserIPCFileDescriptor() {