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/ImageNewShaderTest.cpp b/tests/ImageNewShaderTest.cpp
index 638fa07..ff80729 100644
--- a/tests/ImageNewShaderTest.cpp
+++ b/tests/ImageNewShaderTest.cpp
@@ -17,8 +17,8 @@
 #endif
 
 static void test_bitmap_equality(skiatest::Reporter* reporter, SkBitmap& bm1, SkBitmap& bm2) {
-    REPORTER_ASSERT(reporter, bm1.getSize() == bm2.getSize());
-    REPORTER_ASSERT(reporter, 0 == memcmp(bm1.getPixels(), bm2.getPixels(), bm1.getSize()));
+    REPORTER_ASSERT(reporter, bm1.computeByteSize() == bm2.computeByteSize());
+    REPORTER_ASSERT(reporter, 0 == memcmp(bm1.getPixels(), bm2.getPixels(), bm1.computeByteSize()));
 }
 
 static void paint_source(SkSurface* sourceSurface) {