Use webrtc::DesktopCapturer for screen capturer implementation.

media/video/capture/screen/shared_buffer.cc

-// 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 "media/video/capture/screen/shared_buffer.h"
-
-const bool kReadOnly = true;
-
-namespace media {
-
-SharedBuffer::SharedBuffer(uint32 size)
-    : id_(0),
-      size_(size) {
-  shared_memory_.CreateAndMapAnonymous(size);
-}
-
-SharedBuffer::SharedBuffer(
-    int id, base::SharedMemoryHandle handle, uint32 size)
-    : id_(id),
-      shared_memory_(handle, kReadOnly),
-      size_(size) {
-  shared_memory_.Map(size);
-}
-
-SharedBuffer::SharedBuffer(
-    int id, base::SharedMemoryHandle handle, base::ProcessHandle process,
-    uint32 size)
-    : id_(id),
-      shared_memory_(handle, kReadOnly, process),
-      size_(size) {
-  shared_memory_.Map(size);
-}
-
-SharedBuffer::~SharedBuffer() {
-}
-
-bool SharedBuffer::ShareToProcess(base::ProcessHandle process,
-                                  base::SharedMemoryHandle* new_handle) {
-  return shared_memory_.ShareToProcess(process, new_handle);
-}
-
-}  // namespace media