Introduce ChannelMojo

mojo/embedder/embedder.cc

 // Copyright 2014 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 "mojo/embedder/embedder.h"
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 79 matching lines @@
     callback.Run(channel_info.release());
   }
 }
 
 }  // namespace
 
 void Init() {
   system::entrypoints::SetCore(new system::Core());
 }
 
+void InitIfNeeded() {
+  if (!system::entrypoints::GetCore())
+    system::entrypoints::SetCore(new system::Core());
+}
+
 ScopedMessagePipeHandle CreateChannel(
     ScopedPlatformHandle platform_handle,
     scoped_refptr<base::TaskRunner> io_thread_task_runner,
     DidCreateChannelCallback callback,
     scoped_refptr<base::TaskRunner> callback_thread_task_runner) {
   DCHECK(platform_handle.is_valid());
 
   std::pair<scoped_refptr<system::MessagePipeDispatcher>,
             scoped_refptr<system::MessagePipe> > remote_message_pipe =
       system::MessagePipeDispatcher::CreateRemoteMessagePipe();
@@ skipping 60 matching lines @@
   if (dispatcher->GetType() != system::Dispatcher::kTypePlatformHandle)
     return MOJO_RESULT_INVALID_ARGUMENT;
 
   *platform_handle = static_cast<system::PlatformHandleDispatcher*>(
       dispatcher.get())->PassPlatformHandle().Pass();
   return MOJO_RESULT_OK;
 }
 
 }  // namespace embedder
 }  // namespace mojo