Added PointLights to SkLights::Light

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2237493002

Review-Url: https://codereview.chromium.org/2237493002
diff --git a/src/core/SkCanvas.cpp b/src/core/SkCanvas.cpp
index 4160df7..d199e5d 100644
--- a/src/core/SkCanvas.cpp
+++ b/src/core/SkCanvas.cpp
@@ -3198,8 +3198,8 @@
     // povDepthMap
     {
         SkLights::Builder builder;
-        builder.add(SkLights::Light(SkColor3f::Make(1.0f, 1.0f, 1.0f),
-                                    SkVector3::Make(0.0f, 0.0f, 1.0f)));
+        builder.add(SkLights::Light::MakeDirectional(SkColor3f::Make(1.0f, 1.0f, 1.0f),
+                                                     SkVector3::Make(0.0f, 0.0f, 1.0f)));
         sk_sp<SkLights> povLight = builder.finish();
 
         SkImageInfo info = SkImageInfo::Make(picture->cullRect().width(),