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/bench/WritePixelsBench.cpp b/bench/WritePixelsBench.cpp
index 820bb59..5d6787e 100644
--- a/bench/WritePixelsBench.cpp
+++ b/bench/WritePixelsBench.cpp
@@ -52,7 +52,7 @@
 
         SkBitmap bmp;
         bmp.allocN32Pixels(size.width(), size.height());
-        canvas->readPixels(&bmp, 0, 0);
+        canvas->readPixels(bmp, 0, 0);
 
         SkImageInfo info = SkImageInfo::Make(bmp.width(), bmp.height(), fColorType, fAlphaType);