Added a system caret used for accessibility on Windows.

ui/accessibility/platform/ax_fake_caret_win.cc

 // 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_fake_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 {
 
 AXFakeCaretWin::AXFakeCaretWin(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;
-  data_.SetName(L"caret");
+  // According to MSDN, "Edit" should be the name of the caret object.
+  data_.SetName(L"Edit");
   data_.offset_container_id = -1;
 }
 
 AXFakeCaretWin::~AXFakeCaretWin() {
   caret_->Destroy();
   caret_ = nullptr;
 }
 
 base::win::ScopedComPtr<IAccessible> AXFakeCaretWin::GetCaret() const {
   base::win::ScopedComPtr<IAccessible> caret_accessible;
@@ skipping 62 matching lines @@
 
 bool AXFakeCaretWin::AccessibilityPerformAction(const ui::AXActionData& data) {
   return false;
 }
 
 bool AXFakeCaretWin::ShouldIgnoreHoveredStateForTesting() {
   return true;
 }
 
 }  // namespace ui