aura: Remove WindowTreeHost::PostNativeEvent().

ui/aura/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_AURA_WINDOW_TREE_HOST_WIN_H_
 #define UI_AURA_WINDOW_TREE_HOST_WIN_H_
 
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "ui/aura/aura_export.h"
@@ skipping 18 matching lines @@
   virtual void Show() override;
   virtual void Hide() override;
   virtual gfx::Rect GetBounds() const override;
   virtual void SetBounds(const gfx::Rect& bounds) override;
   virtual gfx::Point GetLocationOnNativeScreen() const override;
   virtual void SetCapture() override;
   virtual void ReleaseCapture() override;
   virtual void SetCursorNative(gfx::NativeCursor cursor) override;
   virtual void MoveCursorToNative(const gfx::Point& location) override;
   virtual void OnCursorVisibilityChangedNative(bool show) override;
-  virtual void PostNativeEvent(const base::NativeEvent& native_event) override;
 
   // ui::EventSource:
   virtual ui::EventProcessor* GetEventProcessor() override;
 
  protected:
   gfx::AcceleratedWidget hwnd() const { return widget_; }
 
  private:
   // ui::PlatformWindowDelegate:
   virtual void OnBoundsChanged(const gfx::Rect& new_bounds) override;
@@ skipping 11 matching lines @@
   gfx::Rect bounds_;
   gfx::AcceleratedWidget widget_;
   scoped_ptr<ui::PlatformWindow> window_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowTreeHostWin);
 };
 
 }  // namespace aura
 
 #endif  // UI_AURA_WINDOW_TREE_HOST_WIN_H_