Revert "Move mojo edk into mojo/edk"

mojo/edk/embedder/simple_platform_shared_buffer.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/embedder/simple_platform_shared_buffer.h"
-
-#include "base/logging.h"
-#include "mojo/edk/embedder/platform_handle_utils.h"
-
-namespace mojo {
-namespace embedder {
-
-// static
-SimplePlatformSharedBuffer* SimplePlatformSharedBuffer::Create(
-    size_t num_bytes) {
-  DCHECK_GT(num_bytes, 0u);
-
-  SimplePlatformSharedBuffer* rv = new SimplePlatformSharedBuffer(num_bytes);
-  if (!rv->Init()) {
-    // We can't just delete it directly, due to the "in destructor" (debug)
-    // check.
-    scoped_refptr<SimplePlatformSharedBuffer> deleter(rv);
-    return nullptr;
-  }
-
-  return rv;
-}
-
-// static
-SimplePlatformSharedBuffer*
-SimplePlatformSharedBuffer::CreateFromPlatformHandle(
-    size_t num_bytes,
-    ScopedPlatformHandle platform_handle) {
-  DCHECK_GT(num_bytes, 0u);
-
-  SimplePlatformSharedBuffer* rv = new SimplePlatformSharedBuffer(num_bytes);
-  if (!rv->InitFromPlatformHandle(platform_handle.Pass())) {
-    // We can't just delete it directly, due to the "in destructor" (debug)
-    // check.
-    scoped_refptr<SimplePlatformSharedBuffer> deleter(rv);
-    return nullptr;
-  }
-
-  return rv;
-}
-
-size_t SimplePlatformSharedBuffer::GetNumBytes() const {
-  return num_bytes_;
-}
-
-scoped_ptr<PlatformSharedBufferMapping> SimplePlatformSharedBuffer::Map(
-    size_t offset,
-    size_t length) {
-  if (!IsValidMap(offset, length))
-    return nullptr;
-
-  return MapNoCheck(offset, length);
-}
-
-bool SimplePlatformSharedBuffer::IsValidMap(size_t offset, size_t length) {
-  if (offset > num_bytes_ || length == 0)
-    return false;
-
-  // Note: This is an overflow-safe check of |offset + length > num_bytes_|
-  // (that |num_bytes >= offset| is verified above).
-  if (length > num_bytes_ - offset)
-    return false;
-
-  return true;
-}
-
-scoped_ptr<PlatformSharedBufferMapping> SimplePlatformSharedBuffer::MapNoCheck(
-    size_t offset,
-    size_t length) {
-  DCHECK(IsValidMap(offset, length));
-  return MapImpl(offset, length);
-}
-
-ScopedPlatformHandle SimplePlatformSharedBuffer::DuplicatePlatformHandle() {
-  return mojo::embedder::DuplicatePlatformHandle(handle_.get());
-}
-
-ScopedPlatformHandle SimplePlatformSharedBuffer::PassPlatformHandle() {
-  DCHECK(HasOneRef());
-  return handle_.Pass();
-}
-
-SimplePlatformSharedBuffer::SimplePlatformSharedBuffer(size_t num_bytes)
-    : num_bytes_(num_bytes) {
-}
-
-SimplePlatformSharedBuffer::~SimplePlatformSharedBuffer() {
-}
-
-SimplePlatformSharedBufferMapping::~SimplePlatformSharedBufferMapping() {
-  Unmap();
-}
-
-void* SimplePlatformSharedBufferMapping::GetBase() const {
-  return base_;
-}
-
-size_t SimplePlatformSharedBufferMapping::GetLength() const {
-  return length_;
-}
-
-}  // namespace embedder
-}  // namespace mojo