Clear the cached avatar button offset when the DPI scaling changes

chrome/browser/ui/views/frame/minimize_button_metrics_win.cc

Index: chrome/browser/ui/views/frame/minimize_button_metrics_win.cc
diff --git a/chrome/browser/ui/views/frame/minimize_button_metrics_win.cc b/chrome/browser/ui/views/frame/minimize_button_metrics_win.cc
index 93080cd5c189c62b00c9e8fe87185b438f2cf545..55e008697eb92c1801c8e7e87f708a819d0843bb 100644
--- a/chrome/browser/ui/views/frame/minimize_button_metrics_win.cc
+++ b/chrome/browser/ui/views/frame/minimize_button_metrics_win.cc
@@ -87,6 +87,12 @@ void MinimizeButtonMetrics::OnHWNDActivated() {
   // correct.
 }
 
+void MinimizeButtonMetrics::OnDpiChanged() {
+  // This ensures that the next time GetMinimizeButtonOffsetX() is called, it
+  // will be recalculated, given the new scale factor.
+  cached_minimize_button_x_delta_ = 0;
+}
+
 // This function attempts to calculate the odd and varying difference
 // between the results of DwmGetWindowAttribute with the
 // DWMWA_CAPTION_BUTTON_BOUNDS flag and the information from the