Remove duplicated function in RenderView.

content/public/renderer/render_view.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_PUBLIC_RENDERER_RENDER_VIEW_H_
 #define CONTENT_PUBLIC_RENDERER_RENDER_VIEW_H_
 
 #include <stddef.h>
 
 #include <string>
@@ skipping 126 matching lines @@
   // Converts the |rect| from Viewport coordinates to Window coordinates.
   // See blink::WebWidgetClient::convertViewportToWindow for more details.
   virtual void ConvertViewportToWindowViaWidget(blink::WebRect* rect) = 0;
 
   // Returns the bounds of |element| in Window coordinates. The bounds have been
   // adjusted to include any transformations, including page scale.
   // This function will update the layout if required.
   virtual gfx::RectF ElementBoundsInWindow(const blink::WebElement& element)
       = 0;
 
-  // Returns the device scale factor for unit tests.
-  virtual float GetDeviceScaleFactorForTest() const = 0;
-
   virtual bool HasAddedInputHandler() const = 0;
 
  protected:
   ~RenderView() override {}
 
  private:
   // This interface should only be implemented inside content.
   friend class RenderViewImpl;
   RenderView() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_RENDERER_RENDER_VIEW_H_