Added a system caret used for accessibility on Windows.

ui/accessibility/platform/ax_system_caret_win.h

 // 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.
 
-#ifndef UI_ACCESSIBILITY_PLATFORM_AX_FAKE_CARET_WIN_H_
-#define UI_ACCESSIBILITY_PLATFORM_AX_FAKE_CARET_WIN_H_
+#ifndef UI_ACCESSIBILITY_PLATFORM_AX_SYSTEM_CARET_WIN_H_
+#define UI_ACCESSIBILITY_PLATFORM_AX_SYSTEM_CARET_WIN_H_
 
 #include <oleacc.h>
 
 #include "base/macros.h"
 #include "base/win/scoped_comptr.h"
 #include "ui/accessibility/ax_export.h"
 #include "ui/accessibility/ax_node_data.h"
 #include "ui/accessibility/ax_tree_data.h"
 #include "ui/accessibility/platform/ax_platform_node_delegate.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/gfx/native_widget_types.h"
 
 namespace ui {
 
 class AXPlatformNodeWin;
 
 // A class representing the position of the caret to assistive software on
 // Windows. This is required because Chrome doesn't use the standard system
 // caret and because some assistive software still relies on specific
 // accessibility APIs to retrieve the caret position.
-class AX_EXPORT AXFakeCaretWin : private AXPlatformNodeDelegate {
+class AX_EXPORT AXSystemCaretWin : private AXPlatformNodeDelegate {
  public:
-  AXFakeCaretWin(gfx::AcceleratedWidget event_target);
-  virtual ~AXFakeCaretWin();
+  explicit AXSystemCaretWin(gfx::AcceleratedWidget event_target);
+  virtual ~AXSystemCaretWin();
 
   base::win::ScopedComPtr<IAccessible> GetCaret() const;
   void MoveCaretTo(const gfx::Rect& bounds);
 
  private:
   // |AXPlatformNodeDelegate| members.
   const AXNodeData& GetData() const override;
   const ui::AXTreeData& GetTreeData() const override;
   gfx::NativeWindow GetTopLevelWidget() override;
   gfx::NativeViewAccessible GetParent() override;
   int GetChildCount() override;
   gfx::NativeViewAccessible ChildAtIndex(int index) override;
   gfx::Rect GetScreenBoundsRect() const override;
   gfx::NativeViewAccessible HitTestSync(int x, int y) override;
   gfx::NativeViewAccessible GetFocus() override;
   gfx::AcceleratedWidget GetTargetForNativeAccessibilityEvent() override;
   bool AccessibilityPerformAction(const ui::AXActionData& data) override;
   bool ShouldIgnoreHoveredStateForTesting() override;
 
   AXPlatformNodeWin* caret_;
   gfx::AcceleratedWidget event_target_;
   AXNodeData data_;
 
   friend class AXPlatformNodeWin;
-  DISALLOW_COPY_AND_ASSIGN(AXFakeCaretWin);
+  DISALLOW_COPY_AND_ASSIGN(AXSystemCaretWin);
 };
 
 }  // namespace ui
 
-#endif  // UI_ACCESSIBILITY_PLATFORM_AX_FAKE_CARET_WIN_H_
+#endif  // UI_ACCESSIBILITY_PLATFORM_AX_SYSTEM_CARET_WIN_H_