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_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;
-
-// Maximum number of active memory mappings.
-const size_t kMaxMappingTableSize = 1000000;
-
-const size_t kMaxWaitManyNumHandles = kMaxHandleTableSize;
-
-const size_t kMaxMessageNumBytes = 4 * 1024 * 1024;
-
-const size_t kMaxMessageNumHandles = 10000;
-
-// Maximum capacity of a data pipe, in bytes. This value must fit into a
-// |uint32_t|.
-// WARNING: If you bump it closer to 2^32, you must audit all the code to check
-// that we don't overflow (2^31 would definitely be risky; up to 2^30 is
-// probably okay).
-const size_t kMaxDataPipeCapacityBytes = 256 * 1024 * 1024;  // 256 MB.
-
-const size_t kDefaultDataPipeCapacityBytes = 1024 * 1024;  // 1 MB.
-
-// Alignment for the "start" of the data buffer used by data pipes. (The
-// alignment of elements will depend on this and the element size.)
-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_SYSTEM_CONSTANTS_H_