Revert[4] "guard old apis for querying byte-size of a bitmap/imageinfo/pixmap"

This reverts commit 5a2e50edc51006ce91366e177a9d21a16775d7fd.

Bug: skia:
Change-Id: I8d28b5c07d90130e5a1653923740eaf189ecb954
Reviewed-on: https://skia-review.googlesource.com/53900
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
diff --git a/tests/ResourceCacheTest.cpp b/tests/ResourceCacheTest.cpp
index b3d0bd5..af33f2d 100644
--- a/tests/ResourceCacheTest.cpp
+++ b/tests/ResourceCacheTest.cpp
@@ -49,7 +49,7 @@
     SkBitmap src;
     src.allocN32Pixels(size.width(), size.height());
     src.eraseColor(SK_ColorBLACK);
-    size_t srcSize = src.getSize();
+    size_t srcSize = src.computeByteSize();
 
     size_t initialCacheSize;
     context->getResourceCacheUsage(nullptr, &initialCacheSize);