Implement cursor compositing mode on Ash

ash/wm/ash_native_cursor_manager.h

 // 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.
 
 #ifndef ASH_WM_ASH_NATIVE_CURSOR_MANAGER_H_
 #define ASH_WM_ASH_NATIVE_CURSOR_MANAGER_H_
 
 #include "ash/ash_export.h"
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
@@ skipping 15 matching lines @@
 // This does the ash-specific setting of cursor details like cursor
 // visibility. It communicates back with the CursorManager through the
 // NativeCursorManagerDelegate interface, which receives messages about what
 // changes were acted on.
 class ASH_EXPORT AshNativeCursorManager
     : public views::corewm::NativeCursorManager {
  public:
   AshNativeCursorManager();
   virtual ~AshNativeCursorManager();
 
+  // Toggle native cursor enabled/disabled.
+  // The native cursor is enabled by default. When disabled, we hide the native
+  // cursor regardless of visibility state, and let CursorWindowManager draw
+  // the cursor.
+  void SetNativeCursorEnabled(bool enabled);
+
  private:
   friend class test::CursorManagerTestApi;
 
   // Overridden from views::corewm::NativeCursorManager:
   virtual void SetDisplay(
       const gfx::Display& display,
       views::corewm::NativeCursorManagerDelegate* delegate) OVERRIDE;
   virtual void SetCursor(
       gfx::NativeCursor cursor,
       views::corewm::NativeCursorManagerDelegate* delegate) OVERRIDE;
   virtual void SetVisibility(
       bool visible,
       views::corewm::NativeCursorManagerDelegate* delegate) OVERRIDE;
   virtual void SetScale(
       float scale,
       views::corewm::NativeCursorManagerDelegate* delegate) OVERRIDE;
   virtual void SetCursorSet(
       ui::CursorSetType cursor_set,
       views::corewm::NativeCursorManagerDelegate* delegate) OVERRIDE;
   virtual void SetMouseEventsEnabled(
       bool enabled,
       views::corewm::NativeCursorManagerDelegate* delegate) OVERRIDE;
 
   // The cursor location where the cursor was disabled.
   gfx::Point disabled_cursor_location_;
 
+  bool native_cursor_enabled_;
+
   scoped_ptr<ImageCursors> image_cursors_;
 
   DISALLOW_COPY_AND_ASSIGN(AshNativeCursorManager);
 };
 
 }  // namespace ash
 
 #endif  // ASH_WM_ASH_NATIVE_CURSOR_MANAGER_H_