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

Previously we had size_t and uint64_t variations.

The new (simpler) API always..
- returns size_t, or 0 if the calculation overflowed
- returns the trimmed size (does not include rowBytes padding for the last row)

Bug: skia:
Change-Id: I05173e877918327c7b207d2f7f1ab0db36892e2e
Reviewed-on: https://skia-review.googlesource.com/50980
Commit-Queue: Mike Reed <reed@google.com>
Reviewed-by: Florin Malita <fmalita@chromium.org>
Reviewed-by: Leon Scroggins <scroggo@google.com>
diff --git a/tests/WritePixelsTest.cpp b/tests/WritePixelsTest.cpp
index 81dcbe7..7ea0aad 100644
--- a/tests/WritePixelsTest.cpp
+++ b/tests/WritePixelsTest.cpp
@@ -394,7 +394,7 @@
     const SkImageInfo info = SkImageInfo::MakeN32Premul(DEV_W, DEV_H);
     for (auto& tightRowBytes : { true, false }) {
         const size_t rowBytes = tightRowBytes ? info.minRowBytes() : 4 * DEV_W + 100;
-        const size_t size = info.getSafeSize(rowBytes);
+        const size_t size = info.computeByteSize(rowBytes);
         void* pixels = sk_malloc_throw(size);
         // if rowBytes isn't tight then set the padding to a known value
         if (!tightRowBytes) {