Only Update the Scale Factor if the Scale Factor Actually Changed

ui/display/win/screen_win.cc

Index: ui/display/win/screen_win.cc
diff --git a/ui/display/win/screen_win.cc b/ui/display/win/screen_win.cc
index 89482d36bf74f21f30f735800caa33b3f7344b7e..5104d5c78e552ee803e5cc9456e8af0263e1e713 100644
--- a/ui/display/win/screen_win.cc
+++ b/ui/display/win/screen_win.cc
@@ -313,6 +313,18 @@ int ScreenWin::GetSystemMetricsForHwnd(HWND hwnd, int metric) {
       system_metrics_result * metrics_relative_scale_factor));
 }
 
+// static
+float ScreenWin::GetScaleFactorForHWND(HWND hwnd) {
+  if (!g_screen_win_instance)
+    return ScreenWinDisplay().display().device_scale_factor();
+
+  DCHECK(hwnd);
+  HWND rootHwnd = g_screen_win_instance->GetRootWindow(hwnd);
+  ScreenWinDisplay screen_win_display =
+      g_screen_win_instance->GetScreenWinDisplayNearestHWND(rootHwnd);
+  return screen_win_display.display().device_scale_factor();
+}
+
 HWND ScreenWin::GetHWNDFromNativeView(gfx::NativeView window) const {
   NOTREACHED();
   return nullptr;
@@ -529,18 +541,6 @@ ScreenWinDisplay ScreenWin::GetScreenWinDisplay(
 }
 
 // static
-float ScreenWin::GetScaleFactorForHWND(HWND hwnd) {
-  if (!g_screen_win_instance)
-    return ScreenWinDisplay().display().device_scale_factor();
-
-  DCHECK(hwnd);
-  HWND rootHwnd = g_screen_win_instance->GetRootWindow(hwnd);
-  ScreenWinDisplay screen_win_display =
-      g_screen_win_instance->GetScreenWinDisplayNearestHWND(rootHwnd);
-  return screen_win_display.display().device_scale_factor();
-}
-
-// static
 template <typename Getter, typename GetterType>
 ScreenWinDisplay ScreenWin::GetScreenWinDisplayVia(Getter getter,
                                                    GetterType value) {