remove ui::gfx::GetDeviceScaleFactor

ui/gfx/win/dpi.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_GFX_DPI_WIN_H_
 #define UI_GFX_DPI_WIN_H_
 
 #include "ui/gfx/gfx_export.h"
 #include "ui/gfx/point.h"
 #include "ui/gfx/rect.h"
@@ skipping 18 matching lines @@
 GFX_EXPORT bool IsHighDPIEnabled();
 
 GFX_EXPORT void EnableHighDPISupport();
 
 GFX_EXPORT void ForceHighDPISupportForTesting(float scale);
 
 // TODO(kevers|girard):  Move above methods into win namespace.
 
 namespace win {
 
-GFX_EXPORT float GetDeviceScaleFactor();
-
 GFX_EXPORT Point ScreenToDIPPoint(const Point& pixel_point);
 
 GFX_EXPORT Point DIPToScreenPoint(const Point& dip_point);
 
 // WARNING: there is no right way to scale sizes and rects. The implementation
 // of these strives to maintain a constant size by scaling the size independent
 // of the origin. An alternative is to get the enclosing rect, which is the
 // right way for some situations. Understand which you need before blindly
 // assuming this is the right way.
 GFX_EXPORT Rect ScreenToDIPRect(const Rect& pixel_bounds);
 GFX_EXPORT Rect DIPToScreenRect(const Rect& dip_bounds);
 GFX_EXPORT Size ScreenToDIPSize(const Size& size_in_pixels);
 GFX_EXPORT Size DIPToScreenSize(const Size& dip_size);
 
 // Win32's GetSystemMetrics uses pixel measures. This function calls
 // GetSystemMetrics for the given |metric|, then converts the result to DIP.
 GFX_EXPORT int GetSystemMetricsInDIP(int metric);
 
 // Returns true if the global device scale factor has been explicitly set for
 // the process.
 GFX_EXPORT bool IsDeviceScaleFactorSet();
 
 GFX_EXPORT extern const wchar_t kRegistryProfilePath[];
 GFX_EXPORT extern const wchar_t kHighDPISupportW[];
 
 }  // namespace win
 }  // namespace gfx
 
 #endif  // UI_GFX_DPI_WIN_H_