Add display::GetDisplayNearestView

content/browser/renderer_host/render_widget_host_view_mac.mm

Index: content/browser/renderer_host/render_widget_host_view_mac.mm
diff --git a/content/browser/renderer_host/render_widget_host_view_mac.mm b/content/browser/renderer_host/render_widget_host_view_mac.mm
index f2c270f4e98538aa89fa4d6c538509d511e509ab..3d7b4c3487239464cfedb460468003a2c1a4b55e 100644
--- a/content/browser/renderer_host/render_widget_host_view_mac.mm
+++ b/content/browser/renderer_host/render_widget_host_view_mac.mm
@@ -692,7 +692,7 @@ int RenderWidgetHostViewMac::window_number() const {
 }
 
 float RenderWidgetHostViewMac::ViewScaleFactor() const {

[tapted, 2017/02/15 00:36:10]

This method should just be deleted. Callers should either use
current_device_scale_factor() from the parent class, or the
GetScaleFactorForNativeView() method that you're adding.

[Jinsuk Kim, 2017/02/16 10:11:25]

Done.

-  return ui::GetScaleFactorForNativeView(cocoa_view_);
+  return GetScaleFactorForNativeView(cocoa_view_);
 }
 
 void RenderWidgetHostViewMac::UpdateDisplayLink() {