use colortype instead of config

src/effects/SkLightingImageFilter.cpp

Index: src/effects/SkLightingImageFilter.cpp
diff --git a/src/effects/SkLightingImageFilter.cpp b/src/effects/SkLightingImageFilter.cpp
index 24fdd0e9fdd699140a1616a6e380a0c433116bc2..c0c605ca040b88216ccd3b4dbdf7785aa74cb04f 100644
--- a/src/effects/SkLightingImageFilter.cpp
+++ b/src/effects/SkLightingImageFilter.cpp
@@ -960,8 +960,7 @@ bool SkDiffuseLightingImageFilter::onFilterImage(Proxy* proxy,
         return false;
     }
 
-    dst->setConfig(src.config(), bounds.width(), bounds.height());
-    if (!dst->allocPixels()) {
+    if (!dst->allocPixels(src.info().makeWH(bounds.width(), bounds.height()))) {
         return false;
     }
 
@@ -1052,9 +1051,7 @@ bool SkSpecularLightingImageFilter::onFilterImage(Proxy* proxy,
         return false;
     }
 
-    dst->setConfig(src.config(), bounds.width(), bounds.height());
-    dst->allocPixels();
-    if (!dst->getPixels()) {
+    if (!dst->allocPixels(src.info().makeWH(bounds.width(), bounds.height()))) {
         return false;
     }