[mojo-edk] Make the Mojo EDK compile under NaCl.

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 355c65f667a094dcc200a10f4201f47da14ea06c..efb3e43c04581819dd435a42da6fe92f2e03756d 100644
--- a/mojo/edk/system/core.cc
+++ b/mojo/edk/system/core.cc
@@ -18,7 +18,6 @@
 #include "base/rand_util.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "base/time/time.h"
-#include "crypto/random.h"
 #include "mojo/edk/embedder/embedder.h"
 #include "mojo/edk/embedder/embedder_internal.h"
 #include "mojo/edk/embedder/platform_shared_buffer.h"
@@ -316,6 +315,10 @@ void Core::RequestShutdown(const base::Closure& callback) {
 
 ScopedMessagePipeHandle Core::CreateMessagePipe(
     ScopedPlatformHandle platform_handle) {
+#if defined(OS_NACL)
+  NOTREACHED();
+  return ScopedMessagePipeHandle();
+#else
   ports::PortRef port0, port1;
   GetNodeController()->node()->CreatePortPair(&port0, &port1);
   MojoHandle handle = AddDispatcher(
@@ -324,6 +327,7 @@ ScopedMessagePipeHandle Core::CreateMessagePipe(
   RemoteMessagePipeBootstrap::Create(
       GetNodeController(), std::move(platform_handle), port1);
   return ScopedMessagePipeHandle(MessagePipeHandle(handle));
+#endif
 }
 
 ScopedMessagePipeHandle Core::CreateParentMessagePipe(