[mojo] Implement data pipe using a shared buffer.

mojo/edk/system/core.cc

Index: mojo/edk/system/core.cc
diff --git a/mojo/edk/system/core.cc b/mojo/edk/system/core.cc
index 80e9815ac5f21808f7a401330ddbd90d65679a12..bd618cf42e8b31563f4285cec0e055e665412000 100644
--- a/mojo/edk/system/core.cc
+++ b/mojo/edk/system/core.cc
@@ -475,8 +475,10 @@ MojoResult Core::CreateDataPipe(
   server_handle = channel_pair.PassServerHandle();
   client_handle = channel_pair.PassClientHandle();
 #endif
-  producer_dispatcher->Init(std::move(server_handle), nullptr, 0u);
-  consumer_dispatcher->Init(std::move(client_handle), nullptr, 0u);
+  producer_dispatcher->Init(std::move(server_handle), nullptr, 0u, nullptr, 0u,
+                            ScopedPlatformHandle(), 0, 0);
+  consumer_dispatcher->Init(std::move(client_handle), nullptr, 0u, nullptr, 0u,
+                            ScopedPlatformHandle(), 0, 0);
 
   *data_pipe_producer_handle = handle_pair.first;
   *data_pipe_consumer_handle = handle_pair.second;