Reland "[graphite] Move Graphite into Skia base directories."

This is a reland of commit ae5e84604724726bce6704e5c69ec9b4ae3c8e98

Original change's description:
> [graphite] Move Graphite into Skia base directories.
>
> Change-Id: Ie0fb74f3766a8b33387c145bd1151344c25808cb
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/528708
> Reviewed-by: Kevin Lubick <[email protected]>
> Reviewed-by: Greg Daniel <[email protected]>
> Commit-Queue: Jim Van Verth <[email protected]>

Change-Id: Ia575fd49206ad0b665a6a9153317e738bb321446
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/529059
Reviewed-by: Kevin Lubick <[email protected]>
Reviewed-by: Greg Daniel <[email protected]>
Commit-Queue: Jim Van Verth <[email protected]>
diff --git a/dm/DMGpuTestProcs.cpp b/dm/DMGpuTestProcs.cpp
index 9f6efe5..6764734 100644
--- a/dm/DMGpuTestProcs.cpp
+++ b/dm/DMGpuTestProcs.cpp
@@ -10,7 +10,7 @@
 #include "include/gpu/GrDirectContext.h"
 
 #ifdef SK_GRAPHITE_ENABLED
-#include "experimental/graphite/include/Context.h"
+#include "include/gpu/graphite/Context.h"
 #include "tools/graphite/ContextFactory.h"
 #endif