Last set of fixes to make the src/mojo/edk pass the page cycler.

mojo/edk/system/message_pipe_dispatcher.cc

Index: mojo/edk/system/message_pipe_dispatcher.cc
diff --git a/mojo/edk/system/message_pipe_dispatcher.cc b/mojo/edk/system/message_pipe_dispatcher.cc
index e3bc13b581b24ffba506af2abf4fdfb38c538948..f4bd93b91d5a740f1b1d76736b98f6b09c5d6044 100644
--- a/mojo/edk/system/message_pipe_dispatcher.cc
+++ b/mojo/edk/system/message_pipe_dispatcher.cc
@@ -118,6 +118,8 @@ void MessagePipeDispatcher::Init(
       InitOnIO();
     }
     // TODO(jam): optimize for when running on IO thread?
+  } else {
+    error_ = true;
   }
 }
 
@@ -636,6 +638,8 @@ bool MessagePipeDispatcher::EndSerializeAndCloseImplNoLock(
 
     serialization->shared_memory_handle_index = platform_handles->size();
     platform_handles->push_back(shared_buffer->PassPlatformHandle().release());
+  } else {
+    serialization->shared_memory_handle_index = kInvalidMessagePipeHandleIndex;
   }
 
   *actual_size = sizeof(SerializedMessagePipeHandleDispatcher);