Use correct device scale factors in Aura

content/browser/renderer_host/dip_util.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_BROWSER_RENDERER_HOST_DIP_UTIL_H_
 #define CONTENT_BROWSER_RENDERER_HOST_DIP_UTIL_H_
 
 #include "content/common/content_export.h"
 #include "ui/base/layout.h"
 
 namespace gfx {
 class Point;
 class Rect;
 class Size;
 }  // namespace gfx
 
 namespace content {
 class RenderWidgetHostView;
 
 // Returns scale factor of the display nearest to |view|.
 // Returns ui::SCALE_FACTOR_100P if the platform does not support DIP.
 CONTENT_EXPORT ui::ScaleFactor GetScaleFactorForView(
     const RenderWidgetHostView* view);
 
 // Utility functions that convert point/size/rect between DIP and pixel
 // coordinate system.
+CONTENT_EXPORT gfx::Size ConvertSizeToDIP(float scale_factor,
+                                          const gfx::Size& size_in_pixel);

[piman, 2013/05/24 01:03:41]

nit: the style guide eschews overloading... 
Maybe rename to ConvertSizeToDIPExplicit or something? Trying to find a good
name that's not too wordy.
Or maybe rename the old ones ConvertViewSizeToDIP etc? Turns out I think most of
them aren't used any more anyway, maybe we could simply  remove them?

[ccameron, 2013/05/24 09:45:03]

Good idea -- I pruned them down to the functions that are used and changed the
view ones to ConvertView*.

 CONTENT_EXPORT gfx::Point ConvertPointToDIP(const RenderWidgetHostView* view,
                                             const gfx::Point& point_in_pixel);
 CONTENT_EXPORT gfx::Size ConvertSizeToDIP(const RenderWidgetHostView* view,
                                           const gfx::Size& size_in_pixel);
+CONTENT_EXPORT gfx::Rect ConvertRectToDIP(float scale_factor,
+                                          const gfx::Rect& rect_in_pixel);
 CONTENT_EXPORT gfx::Rect ConvertRectToDIP(const RenderWidgetHostView* view,
                                           const gfx::Rect& rect_in_pixel);
 CONTENT_EXPORT gfx::Point ConvertPointToPixel(const RenderWidgetHostView* view,
                                               const gfx::Point& point_in_dip);
 CONTENT_EXPORT gfx::Size ConvertSizeToPixel(const RenderWidgetHostView* view,
                                             const gfx::Size& size_in_dip);
+CONTENT_EXPORT gfx::Rect ConvertRectToPixel(float scale_factor,
+                                            const gfx::Rect& rect_in_dip);
 CONTENT_EXPORT gfx::Rect ConvertRectToPixel(const RenderWidgetHostView* view,
                                             const gfx::Rect& rect_in_dip);
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_DIP_UTIL_H_