Create special surfaces according to original device (not always in N32)

tests/SpecialImageTest.cpp

 /*
  * Copyright 2016 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file
  */
 
 #include "SkAutoPixmapStorage.h"
 #include "SkBitmap.h"
 #include "SkCanvas.h"
@@ skipping 67 matching lines @@
     if (context) {
         REPORTER_ASSERT(reporter, kSmallerSize == bitmap.width());
         REPORTER_ASSERT(reporter, kSmallerSize == bitmap.height());
     } else {
         REPORTER_ASSERT(reporter, size == bitmap.width());
         REPORTER_ASSERT(reporter, size == bitmap.height());
     }
 
     //--------------
     // Test that draw restricts itself to the subset
-    SkImageInfo info = SkImageInfo::MakeN32(kFullSize, kFullSize, kOpaque_SkAlphaType);
-
-    sk_sp<SkSpecialSurface> surf(img->makeSurface(info));
+    sk_sp<SkSpecialSurface> surf(img->makeSurface(SkIRect::MakeWH(kFullSize, kFullSize),
+                                                  kOpaque_SkAlphaType));
 
     SkCanvas* canvas = surf->getCanvas();
 
     canvas->clear(SK_ColorBLUE);
     img->draw(canvas, SkIntToScalar(kPad), SkIntToScalar(kPad), nullptr);
 
     SkBitmap bm;
     bm.allocN32Pixels(kFullSize, kFullSize, true);
 
     bool result = canvas->readPixels(bm.info(), bm.getPixels(), bm.rowBytes(), 0, 0);
@@ skipping 184 matching lines @@
         test_image(subSImg1, reporter, context, true, kPad, kFullSize);
     }
 
     {
         sk_sp<SkSpecialImage> subSImg2(fullSImg->makeSubset(subset));
         test_image(subSImg2, reporter, context, true, kPad, kFullSize);
     }
 }
 
 #endif