Simplify accelerated paint and remove windows CanvasSkiaPaint

ui/views/widget/desktop_aura/desktop_window_tree_host_win.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 UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_WINDOW_TREE_HOST_WIN_H_
 #define UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_WINDOW_TREE_HOST_WIN_H_
 
 #include "ui/aura/window_tree_host.h"
 #include "ui/views/views_export.h"
 #include "ui/views/widget/desktop_aura/desktop_window_tree_host.h"
@@ skipping 166 matching lines @@
   bool HandleMouseEvent(const ui::MouseEvent& event) override;
   bool HandleKeyEvent(const ui::KeyEvent& event) override;
   bool HandleUntranslatedKeyEvent(const ui::KeyEvent& event) override;
   void HandleTouchEvent(const ui::TouchEvent& event) override;
   bool HandleIMEMessage(UINT message,
                         WPARAM w_param,
                         LPARAM l_param,
                         LRESULT* result) override;
   void HandleInputLanguageChange(DWORD character_set,
                                  HKL input_language_id) override;
-  bool HandlePaintAccelerated(const gfx::Rect& invalid_rect) override;
-  void HandlePaint(gfx::Canvas* canvas) override;
+  void HandlePaintAccelerated(const gfx::Rect& invalid_rect) override;
   bool HandleTooltipNotify(int w_param,
                            NMHDR* l_param,
                            LRESULT* l_result) override;
   void HandleMenuLoop(bool in_menu_loop) override;
   bool PreHandleMSG(UINT message,
                     WPARAM w_param,
                     LPARAM l_param,
                     LRESULT* result) override;
   void PostHandleMSG(UINT message, WPARAM w_param, LPARAM l_param) override;
   bool HandleScrollEvent(const ui::ScrollEvent& event) override;
@@ skipping 68 matching lines @@
 
   // Set to true if we are about to enter a sizing loop.
   bool in_sizing_loop_;
 
   DISALLOW_COPY_AND_ASSIGN(DesktopWindowTreeHostWin);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_WINDOW_TREE_HOST_WIN_H_