Add popup layout tests with device scale factor

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 f7c4285b77c22af72246b67528f58d52ec246683..15fee621c0ca891a73c512e19ec168931dd71acf 100644
--- a/content/shell/renderer/layout_test/blink_test_runner.cc
+++ b/content/shell/renderer/layout_test/blink_test_runner.cc
@@ -769,6 +769,13 @@ void BlinkTestRunner::OnWebTestProxyBaseDestroy(
     test_runner::WebTestProxyBase* proxy) {
 }
 
+blink::WebPoint BlinkTestRunner::ConvertDIPToNative(
+    const blink::WebPoint& point_in_dip) const {
+  float scale = render_view()->GetDeviceScaleFactorForTest();
+  return blink::WebPoint(point_in_dip.x * scale,
+                         point_in_dip.y * scale);
+}
+
 bool BlinkTestRunner::AddMediaStreamVideoSourceAndTrack(
     blink::WebMediaStream* stream) {
   DCHECK(stream);