Revert of Added a system caret used for accessibility on Windows.

ui/accessibility/platform/ax_system_caret_win.cc

Index: ui/accessibility/platform/ax_system_caret_win.cc
diff --git a/ui/accessibility/platform/ax_system_caret_win.cc b/ui/accessibility/platform/ax_system_caret_win.cc
deleted file mode 100644
index bd6b7e66ae420f50baa4e8135a7eaeb18fdb7f5d..0000000000000000000000000000000000000000
--- a/ui/accessibility/platform/ax_system_caret_win.cc
+++ /dev/null
@@ -1,115 +0,0 @@
-// Copyright 2017 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 "ui/accessibility/platform/ax_system_caret_win.h"
-
-#include <windows.h>
-
-#include "base/logging.h"
-#include "ui/accessibility/ax_enums.h"
-#include "ui/accessibility/platform/ax_platform_node_win.h"
-#include "ui/accessibility/platform/ax_platform_unique_id.h"
-#include "ui/gfx/geometry/rect_conversions.h"
-#include "ui/gfx/geometry/rect_f.h"
-
-namespace ui {
-
-AXSystemCaretWin::AXSystemCaretWin(gfx::AcceleratedWidget event_target)
-    : event_target_(event_target) {
-  caret_ = static_cast<AXPlatformNodeWin*>(AXPlatformNodeWin::Create(this));
-  data_.id = GetNextAXPlatformNodeUniqueId();
-  data_.role = AX_ROLE_CARET;
-  // |get_accState| should return 0 which means that the caret is visible.
-  data_.state = 0;
-  // According to MSDN, "Edit" should be the name of the caret object.
-  data_.SetName(L"Edit");
-  data_.offset_container_id = -1;
-}
-
-AXSystemCaretWin::~AXSystemCaretWin() {
-  caret_->Destroy();
-  caret_ = nullptr;
-}
-
-base::win::ScopedComPtr<IAccessible> AXSystemCaretWin::GetCaret() const {
-  base::win::ScopedComPtr<IAccessible> caret_accessible;
-  HRESULT hr = caret_->QueryInterface(
-      IID_IAccessible,
-      reinterpret_cast<void**>(caret_accessible.GetAddressOf()));
-  DCHECK(SUCCEEDED(hr));
-  return caret_accessible;
-}
-
-void AXSystemCaretWin::MoveCaretTo(const gfx::Rect& bounds) {
-  if (bounds.IsEmpty())
-    return;
-  data_.location = gfx::RectF(bounds);
-  if (event_target_) {
-    ::NotifyWinEvent(EVENT_OBJECT_LOCATIONCHANGE, event_target_, OBJID_CARET,
-                     -data_.id);
-  }
-}
-
-const AXNodeData& AXSystemCaretWin::GetData() const {
-  return data_;
-}
-
-const ui::AXTreeData& AXSystemCaretWin::GetTreeData() const {
-  CR_DEFINE_STATIC_LOCAL(ui::AXTreeData, empty_data, ());
-  return empty_data;
-}
-
-gfx::NativeWindow AXSystemCaretWin::GetTopLevelWidget() {
-  return nullptr;
-}
-
-gfx::NativeViewAccessible AXSystemCaretWin::GetParent() {
-  if (!event_target_)
-    return nullptr;
-
-  gfx::NativeViewAccessible parent;
-  HRESULT hr =
-      ::AccessibleObjectFromWindow(event_target_, OBJID_WINDOW, IID_IAccessible,
-                                   reinterpret_cast<void**>(&parent));
-  if (SUCCEEDED(hr))
-    return parent;
-  return nullptr;
-}
-
-int AXSystemCaretWin::GetChildCount() {
-  return 0;
-}
-
-gfx::NativeViewAccessible AXSystemCaretWin::ChildAtIndex(int index) {
-  return nullptr;
-}
-
-gfx::Rect AXSystemCaretWin::GetScreenBoundsRect() const {
-  gfx::Rect bounds = ToEnclosingRect(data_.location);
-  return bounds;
-}
-
-gfx::NativeViewAccessible AXSystemCaretWin::HitTestSync(int x, int y) {
-  return nullptr;
-}
-
-gfx::NativeViewAccessible AXSystemCaretWin::GetFocus() {
-  return nullptr;
-}
-
-gfx::AcceleratedWidget
-AXSystemCaretWin::GetTargetForNativeAccessibilityEvent() {
-  return event_target_;
-}
-
-bool AXSystemCaretWin::AccessibilityPerformAction(
-    const ui::AXActionData& data) {
-  return false;
-}
-
-bool AXSystemCaretWin::ShouldIgnoreHoveredStateForTesting() {
-  return false;
-}
-
-}  // namespace ui