Revert "Move mojo edk into mojo/edk"

mojo/system/constants.h

 // Copyright 2013 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.
 
-#ifndef MOJO_EDK_SYSTEM_CONSTANTS_H_
-#define MOJO_EDK_SYSTEM_CONSTANTS_H_
+#ifndef MOJO_SYSTEM_CONSTANTS_H_
+#define MOJO_SYSTEM_CONSTANTS_H_
 
 #include <stddef.h>
 
 namespace mojo {
 namespace system {
 
 // Maximum number of open (Mojo) handles.
 // TODO(vtl): This doesn't count "live" handles, some of which may live in
 // messages.
 const size_t kMaxHandleTableSize = 1000000;
@@ skipping 21 matching lines @@
 const size_t kDataPipeBufferAlignmentBytes = 16;
 
 // TODO(vtl): Set this hard limit appropriately (e.g., higher on 64-bit). (This
 // will also entail some auditing to make sure I'm not messing up my checks
 // anywhere.)
 const size_t kMaxSharedMemoryNumBytes = 1024 * 1024 * 1024;  // 1 GB.
 
 }  // namespace system
 }  // namespace mojo
 
-#endif  // MOJO_EDK_SYSTEM_CONSTANTS_H_
+#endif  // MOJO_SYSTEM_CONSTANTS_H_