deprecate odd variants of SkCanvas::readPixels

Bug: skia:6513
Change-Id: I51179a85f0912d3f899c368c30a943d346dd1d05
Reviewed-on: https://skia-review.googlesource.com/13589
Reviewed-by: Florin Malita <fmalita@chromium.org>
Reviewed-by: Matt Sarett <msarett@google.com>
Commit-Queue: Mike Reed <reed@google.com>
diff --git a/tests/PremulAlphaRoundTripTest.cpp b/tests/PremulAlphaRoundTripTest.cpp
index b1310e3..7719ad8 100644
--- a/tests/PremulAlphaRoundTripTest.cpp
+++ b/tests/PremulAlphaRoundTripTest.cpp
@@ -76,10 +76,10 @@
         readBmp1.eraseColor(0);
         readBmp2.eraseColor(0);
 
-        canvas->readPixels(&readBmp1, 0, 0);
+        canvas->readPixels(readBmp1, 0, 0);
         sk_tool_utils::write_pixels(canvas, readBmp1, 0, 0, gUnpremul[upmaIdx].fColorType,
                                     kUnpremul_SkAlphaType);
-        canvas->readPixels(&readBmp2, 0, 0);
+        canvas->readPixels(readBmp2, 0, 0);
 
         bool success = true;
         for (int y = 0; y < 256 && success; ++y) {