refactor/layering: SkMalloc.cpp

Change-Id: Ie27c9f0ba2b9f160010d33548dc8359851610d79
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/251819
Commit-Queue: Hal Canary <halcanary@google.com>
Auto-Submit: Hal Canary <halcanary@google.com>
Reviewed-by: Ben Wagner <bungeman@google.com>
diff --git a/BUILD.gn b/BUILD.gn
index 6c715d4..901a7c1 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -1049,6 +1049,7 @@
     "src/core/SkEdgeClipper.cpp",
     "src/core/SkGeometry.cpp",
     "src/core/SkLineClipper.cpp",
+    "src/core/SkMalloc.cpp",
     "src/core/SkMallocPixelRef.cpp",
     "src/core/SkMath.cpp",
     "src/core/SkMatrix.cpp",