Add SkReadPixelsRec.h & SkImage_Base.h to core.gni

This pebble's been in our shoe long enough!

The _Gpu.cpp files have also been moved into separate gpu.gni
file so they're gone.

Formatter also had its way with the file.

Change-Id: Ia9324953725f070c1a7b250bcb68311168560a29
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/373816
Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
Commit-Queue: Adlai Holler <adlai@google.com>
Auto-Submit: Adlai Holler <adlai@google.com>
diff --git a/gn/core.gni b/gn/core.gni
index a9faba9..8862b8f 100644
--- a/gn/core.gni
+++ b/gn/core.gni
@@ -417,19 +417,17 @@
   "$_src/core/SkYUVPlanesCache.h",
   "$_src/core/SkZip.h",
   "$_src/image/SkImage.cpp",
-  "$_src/lazy/SkDiscardableMemoryPool.cpp",
-
-  #        "$_src/image/SkImage_Gpu.cpp",
+  "$_src/image/SkImage_Base.h",
   "$_src/image/SkImage_Lazy.cpp",
   "$_src/image/SkImage_Lazy.h",
   "$_src/image/SkImage_Raster.cpp",
+  "$_src/image/SkReadPixelsRec.h",
   "$_src/image/SkRescaleAndReadPixels.cpp",
   "$_src/image/SkRescaleAndReadPixels.h",
   "$_src/image/SkSurface.cpp",
   "$_src/image/SkSurface_Base.h",
-
-  #        "$_src/image/SkSurface_Gpu.cpp",
   "$_src/image/SkSurface_Raster.cpp",
+  "$_src/lazy/SkDiscardableMemoryPool.cpp",
   "$_src/opts/SkBlitMask_opts.h",
   "$_src/opts/SkBlitRow_opts.h",
   "$_src/opts/SkChecksum_opts.h",