Improve process launch handle sharing API.

content/browser/file_descriptor_info_impl.cc

Index: content/browser/file_descriptor_info_impl.cc
diff --git a/content/browser/file_descriptor_info_impl.cc b/content/browser/file_descriptor_info_impl.cc
deleted file mode 100644
index 1343e7c3141a382931723f29ddccd076dd048e38..0000000000000000000000000000000000000000
--- a/content/browser/file_descriptor_info_impl.cc
+++ /dev/null
@@ -1,107 +0,0 @@
-// Copyright (c) 2012 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 "content/browser/file_descriptor_info_impl.h"
-
-#include <utility>
-
-#include "base/memory/ptr_util.h"
-#include "base/stl_util.h"
-
-namespace content {
-
-// static
-std::unique_ptr<FileDescriptorInfo> FileDescriptorInfoImpl::Create() {
-  return std::unique_ptr<FileDescriptorInfo>(new FileDescriptorInfoImpl());
-}
-
-FileDescriptorInfoImpl::FileDescriptorInfoImpl() {
-}
-
-FileDescriptorInfoImpl::~FileDescriptorInfoImpl() {
-}
-
-void FileDescriptorInfoImpl::Share(int id, base::PlatformFile fd) {
-  ShareWithRegion(id, fd, base::MemoryMappedFile::Region::kWholeFile);
-}
-
-void FileDescriptorInfoImpl::ShareWithRegion(int id, base::PlatformFile fd,
-    const base::MemoryMappedFile::Region& region) {
-  AddToMapping(id, fd, region);
-}
-
-void FileDescriptorInfoImpl::Transfer(int id, base::ScopedFD fd) {
-  AddToMapping(id, fd.get(), base::MemoryMappedFile::Region::kWholeFile);
-  owned_descriptors_.push_back(std::move(fd));
-}
-
-base::PlatformFile FileDescriptorInfoImpl::GetFDAt(size_t i) const {
-  return mapping_[i].first;
-}
-
-int FileDescriptorInfoImpl::GetIDAt(size_t i) const {
-  return mapping_[i].second;
-}
-
-const base::MemoryMappedFile::Region& FileDescriptorInfoImpl::GetRegionAt(
-    size_t i) const {
-  auto iter = ids_to_regions_.find(GetIDAt(i));
-  return (iter != ids_to_regions_.end()) ?
-      iter->second : base::MemoryMappedFile::Region::kWholeFile;
-}
-
-size_t FileDescriptorInfoImpl::GetMappingSize() const {
-  return mapping_.size();
-}
-
-bool FileDescriptorInfoImpl::HasID(int id) const {
-  for (unsigned i = 0; i < mapping_.size(); ++i) {
-    if (mapping_[i].second == id)
-      return true;
-  }
-
-  return false;
-}
-
-bool FileDescriptorInfoImpl::OwnsFD(base::PlatformFile file) const {
-  return base::ContainsValue(owned_descriptors_, file);
-}
-
-base::ScopedFD FileDescriptorInfoImpl::ReleaseFD(base::PlatformFile file) {
-  DCHECK(OwnsFD(file));
-
-  base::ScopedFD fd;
-  auto found =
-      std::find(owned_descriptors_.begin(), owned_descriptors_.end(), file);
-
-  std::swap(*found, fd);
-  owned_descriptors_.erase(found);
-
-  return fd;
-}
-
-void FileDescriptorInfoImpl::AddToMapping(int id, base::PlatformFile fd,
-    const base::MemoryMappedFile::Region& region) {
-  DCHECK(!HasID(id));
-  mapping_.push_back(std::make_pair(fd, id));
-  if (region != base::MemoryMappedFile::Region::kWholeFile)
-    ids_to_regions_[id] = region;
-}
-
-const base::FileHandleMappingVector& FileDescriptorInfoImpl::GetMapping()
-    const {
-  return mapping_;
-}
-
-std::unique_ptr<base::FileHandleMappingVector>
-FileDescriptorInfoImpl::GetMappingWithIDAdjustment(int delta) const {
-  std::unique_ptr<base::FileHandleMappingVector> result =
-      base::MakeUnique<base::FileHandleMappingVector>(mapping_);
-  // Adding delta to each ID.
-  for (unsigned i = 0; i < mapping_.size(); ++i)
-    (*result)[i].second += delta;
-  return result;
-}
-
-}  // namespace content