replace setConfig+allocPixels with single call

tests/QuickRejectTest.cpp

Index: tests/QuickRejectTest.cpp
diff --git a/tests/QuickRejectTest.cpp b/tests/QuickRejectTest.cpp
index 5c1b8776c21697674a2f2e0c6137d12d3c83a591..2d367389bb81f1e82d0c5cfcd951914270540e63 100644
--- a/tests/QuickRejectTest.cpp
+++ b/tests/QuickRejectTest.cpp
@@ -40,13 +40,11 @@ public:
 
 static void test_drawBitmap(skiatest::Reporter* reporter) {
     SkBitmap src;
-    src.setConfig(SkBitmap::kARGB_8888_Config, 10, 10);
-    src.allocPixels();
+    src.allocN32Pixels(10, 10);
     src.eraseColor(SK_ColorWHITE);
 
     SkBitmap dst;
-    dst.setConfig(SkBitmap::kARGB_8888_Config, 10, 10);
-    dst.allocPixels();
+    dst.allocN32Pixels(10, 10);
     dst.eraseColor(SK_ColorTRANSPARENT);
 
     SkCanvas canvas(dst);