Revert "Move mojo edk into mojo/edk"

mojo/system/message_pipe_unittest.cc

Index: mojo/system/message_pipe_unittest.cc
diff --git a/mojo/edk/system/message_pipe_unittest.cc b/mojo/system/message_pipe_unittest.cc
similarity index 99%
rename from mojo/edk/system/message_pipe_unittest.cc
rename to mojo/system/message_pipe_unittest.cc
index dbffb4c4e48b0eca3b370e6c4f480b29b7e09107..318a82434724ab095127328be50a2502b6d3ae20 100644
--- a/mojo/edk/system/message_pipe_unittest.cc
+++ b/mojo/system/message_pipe_unittest.cc
@@ -2,13 +2,13 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "mojo/edk/system/message_pipe.h"
+#include "mojo/system/message_pipe.h"
 
 #include "base/memory/ref_counted.h"
 #include "base/threading/platform_thread.h"  // For |Sleep()|.
 #include "base/time/time.h"
-#include "mojo/edk/system/waiter.h"
-#include "mojo/edk/system/waiter_test_utils.h"
+#include "mojo/system/waiter.h"
+#include "mojo/system/waiter_test_utils.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace mojo {