Audit and Deprecate DPI Functions in display::win

ui/display/win/dpi.h

Index: ui/display/win/dpi.h
diff --git a/ui/display/win/dpi.h b/ui/display/win/dpi.h
index 23ec954c259a7faa00f96171f0ca960ab0186896..a0df09078dffbe99f491d2d7367135a07cd543b7 100644
--- a/ui/display/win/dpi.h
+++ b/ui/display/win/dpi.h
@@ -27,8 +27,11 @@ DISPLAY_EXPORT int GetDPIFromScalingFactor(float device_scaling_factor);
 // Returns the equivalent scaling factor for |dpi|.
 DISPLAY_EXPORT float GetScalingFactorFromDPI(int dpi);
 
+// Deprecated. Use display::win::ScreenWin::GetSystemMetricsForHwnd instead.

[sky, 2016/07/27 18:28:49]

Should all of the functions in this file be deprecated?

[robliao, 2016/07/27 18:42:56]

Deprecated SetDefaultDeviceScaleFactor and GetDPIScale. The other ones are okay
with per-monitor DPI.

+//
 // Win32's GetSystemMetrics uses pixel measures. This function calls
-// GetSystemMetrics for the given |metric|, then converts the result to DIP.
+// GetSystemMetrics for the given |metric|, then converts the result using the
+// system's DPI to DIP. This does not handle per-monitor DPI.
 DISPLAY_EXPORT int GetSystemMetricsInDIP(int metric);
 
 }  // namespace win