replace setConfig+allocPixels with single call

tests/SkpSkGrTest.cpp

Index: tests/SkpSkGrTest.cpp
diff --git a/tests/SkpSkGrTest.cpp b/tests/SkpSkGrTest.cpp
index 2c01a7e42ab12272cfa5f09afae9ad0055bafe28..02aabbe2af0258aa41d885f9ad45d5e84aeb2de6 100644
--- a/tests/SkpSkGrTest.cpp
+++ b/tests/SkpSkGrTest.cpp
@@ -425,8 +425,7 @@ void TestResult::testOne() {
         do {
             dim.fX = (pWidth + scale - 1) / scale;
             dim.fY = (pHeight + scale - 1) / scale;
-            bitmap.setConfig(SkBitmap::kARGB_8888_Config, dim.fX, dim.fY);
-            bool success = bitmap.allocPixels();
+            bool success = bitmap.allocN32Pixels(, dim.fX, dim.fY);
             if (success) {
                 break;
             }