Move DIP(WIndow) to Viewport conversion code for drag&drop from browser to renderer

content/renderer/render_view_impl.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 CONTENT_RENDERER_RENDER_VIEW_IMPL_H_
 #define CONTENT_RENDERER_RENDER_VIEW_IMPL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 439 matching lines @@
   const std::string& GetAcceptLanguages() const override;
 #if defined(OS_ANDROID)
   void UpdateTopControlsState(TopControlsState constraints,
                               TopControlsState current,
                               bool animate) override;
 #endif
   void convertViewportToWindow(blink::WebRect* rect) override;
   gfx::RectF ElementBoundsInWindow(const blink::WebElement& element) override;
   float GetDeviceScaleFactorForTest() const override;
 
+  gfx::Point ConvertWindowPointToViewport(const gfx::Point& point);
+
   bool uses_temporary_zoom_level() const { return uses_temporary_zoom_level_; }
 
   // Please do not add your stuff randomly to the end here. If there is an
   // appropriate section, add it there. If not, there are some random functions
   // nearer to the top you can add it to.
 
  protected:
   // RenderWidget overrides:
   void CloseForFrame() override;
   void Close() override;
@@ skipping 547 matching lines @@
   // use the Observer interface to filter IPC messages and receive frame change
   // notifications.
   // ---------------------------------------------------------------------------
 
   DISALLOW_COPY_AND_ASSIGN(RenderViewImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDER_VIEW_IMPL_H_