Scale the emulated event in EventSender when use-zoom-for-dsf is enabled

content/shell/renderer/layout_test/blink_test_runner.cc

Index: content/shell/renderer/layout_test/blink_test_runner.cc
diff --git a/content/shell/renderer/layout_test/blink_test_runner.cc b/content/shell/renderer/layout_test/blink_test_runner.cc
index 37de46ca9ef4952fb35f0620f13de0b6b58472d3..8da725f154d1e97c45134fb72e5e82ad6d0530d9 100644
--- a/content/shell/renderer/layout_test/blink_test_runner.cc
+++ b/content/shell/renderer/layout_test/blink_test_runner.cc
@@ -506,6 +506,10 @@ void BlinkTestRunner::SetDeviceScaleFactor(float factor) {
   content::SetDeviceScaleFactor(render_view(), factor);
 }
 
+float BlinkTestRunner::GetWindowToViewportScale() {
+  return content::GetWindowToViewportScale(render_view());
+}
+
 void BlinkTestRunner::EnableUseZoomForDSF() {
   base::CommandLine::ForCurrentProcess()->
       AppendSwitch(switches::kEnableUseZoomForDSF);