replace setConfig+allocPixels with single call

tests/PDFPrimitivesTest.cpp

 /*
  * Copyright 2010 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkBitmap.h"
 #include "SkCanvas.h"
 #include "SkData.h"
@@ skipping 225 matching lines @@
 
     char expectedResult[] =
         "<</Value 33\n>>1 0 obj\n<</InnerValue 44\n>>\nendobj\n";
     REPORTER_ASSERT(reporter, buffer.getOffset() == strlen(expectedResult));
     REPORTER_ASSERT(reporter, stream_equals(buffer, 0, expectedResult,
                                             buffer.getOffset()));
 }
 
 // Create a bitmap that would be very eficiently compressed in a ZIP.
 static void setup_bitmap(SkBitmap* bitmap, int width, int height) {
-    bitmap->setConfig(SkBitmap::kARGB_8888_Config, width, height);
-    bitmap->allocPixels();
+    bitmap->allocN32Pixels(width, height);
     bitmap->eraseColor(SK_ColorWHITE);
 }
 
 static void TestImage(skiatest::Reporter* reporter, const SkBitmap& bitmap,
                       const char* expected, bool useDCTEncoder) {
     SkISize pageSize = SkISize::Make(bitmap.width(), bitmap.height());
     SkAutoTUnref<SkPDFDevice> dev(new SkPDFDevice(pageSize, pageSize, SkMatrix::I()));
 
     if (useDCTEncoder) {
         dev->setDCTEncoder(encode_to_dct_data);
@@ skipping 164 matching lines @@
     TestCatalog(reporter);
 
     TestObjectRef(reporter);
 
     TestSubstitute(reporter);
 
     test_issue1083();
 
     TestImages(reporter);
 }