use SkColorType instead of (deprecated) SkBitmap::Config for copyTo

cc/resources/picture_pile_impl_unittest.cc

Index: cc/resources/picture_pile_impl_unittest.cc
diff --git a/cc/resources/picture_pile_impl_unittest.cc b/cc/resources/picture_pile_impl_unittest.cc
index 5f144ad17d5bf497859e63b92523b93aac0121bb..9d982a9537277101bd05eaddd833be09b10f3dba 100644
--- a/cc/resources/picture_pile_impl_unittest.cc
+++ b/cc/resources/picture_pile_impl_unittest.cc
@@ -674,10 +674,7 @@ TEST(PicturePileImpl, RasterContentsOpaque) {
       canvas_rect.Inset(0, 0, -1, -1);
 
       SkBitmap bitmap;
-      bitmap.setConfig(SkBitmap::kARGB_8888_Config,
-                       canvas_rect.width(),
-                       canvas_rect.height());
-      bitmap.allocPixels();
+      bitmap.allocN32Pixels(canvas_rect.width(), canvas_rect.height());
       SkCanvas canvas(bitmap);
       canvas.clear(SK_ColorTRANSPARENT);
 
@@ -726,10 +723,7 @@ TEST(PicturePileImpl, RasterContentsTransparent) {
   canvas_rect.Inset(0, 0, -1, -1);
 
   SkBitmap bitmap;
-  bitmap.setConfig(SkBitmap::kARGB_8888_Config,
-                   canvas_rect.width(),
-                   canvas_rect.height());
-  bitmap.allocPixels();
+  bitmap.allocN32Pixels(canvas_rect.width(), canvas_rect.height());
   SkCanvas canvas(bitmap);
 
   FakeRenderingStatsInstrumentation rendering_stats_instrumentation;