Revert "Move mojo edk into mojo/edk"

mojo/edk/system/mapping_table.cc

-// Copyright 2014 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.
-
-#include "mojo/edk/system/mapping_table.h"
-
-#include "base/logging.h"
-#include "mojo/edk/embedder/platform_shared_buffer.h"
-#include "mojo/edk/system/constants.h"
-
-namespace mojo {
-namespace system {
-
-MappingTable::MappingTable() {
-}
-
-MappingTable::~MappingTable() {
-  // This should usually not be reached (the only instance should be owned by
-  // the singleton |Core|, which lives forever), except in tests.
-}
-
-MojoResult MappingTable::AddMapping(
-    scoped_ptr<embedder::PlatformSharedBufferMapping> mapping) {
-  DCHECK(mapping);
-
-  if (address_to_mapping_map_.size() >= kMaxMappingTableSize)
-    return MOJO_RESULT_RESOURCE_EXHAUSTED;
-
-  uintptr_t address = reinterpret_cast<uintptr_t>(mapping->GetBase());
-  DCHECK(address_to_mapping_map_.find(address) ==
-         address_to_mapping_map_.end());
-  address_to_mapping_map_[address] = mapping.release();
-  return MOJO_RESULT_OK;
-}
-
-MojoResult MappingTable::RemoveMapping(uintptr_t address) {
-  AddressToMappingMap::iterator it = address_to_mapping_map_.find(address);
-  if (it == address_to_mapping_map_.end())
-    return MOJO_RESULT_INVALID_ARGUMENT;
-  embedder::PlatformSharedBufferMapping* mapping_to_delete = it->second;
-  address_to_mapping_map_.erase(it);
-  delete mapping_to_delete;
-  return MOJO_RESULT_OK;
-}
-
-}  // namespace system
-}  // namespace mojo