Revert "Revert "Revert "guard old apis for querying byte-size of a bitmap/imageinfo/pixmap"""

This reverts commit cd284c532376d16fcc4ed75baf3da65c3e4a2e95.

Reason for revert:

assert fired in SkMallocPixelRef.cpp:61: fatal error: "assert(info.computeByteSize(rowBytes) == info.getSafeSize(rowBytes))"

google3 thinks it was from surface_rowbytes

Original change's description:
> Revert "Revert "guard old apis for querying byte-size of a bitmap/imageinfo/pixmap""
> 
> This reverts commit 809cbedd4b252be221b2ac3b4269d312fd8f53a0.
> 
> Bug: skia:
> Change-Id: I680d8daeeeeb15526b44c1305d8fb0c6bfa38e1d
> Reviewed-on: https://skia-review.googlesource.com/52665
> Commit-Queue: Mike Reed <reed@google.com>
> Reviewed-by: Florin Malita <fmalita@chromium.org>

TBR=fmalita@chromium.org,reed@google.com

Change-Id: I41e3f7a3f791cc8183291847e783ed8a53bc91d2
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: skia:
Reviewed-on: https://skia-review.googlesource.com/53802
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
diff --git a/src/utils/mac/SkCreateCGImageRef.cpp b/src/utils/mac/SkCreateCGImageRef.cpp
index 1514ba6..fd55d91 100644
--- a/src/utils/mac/SkCreateCGImageRef.cpp
+++ b/src/utils/mac/SkCreateCGImageRef.cpp
@@ -132,7 +132,7 @@
 
     const int w = bitmap->width();
     const int h = bitmap->height();
-    const size_t s = bitmap->computeByteSize();
+    const size_t s = bitmap->getSize();
 
     // our provider "owns" the bitmap*, and will take care of deleting it
     CGDataProviderRef dataRef = CGDataProviderCreateWithData(bitmap, bitmap->getPixels(), s,