move files out of private, and fix up callers to IWYU

Realized that a pending CL needed to add (yet another) private type to SkRecords.h, but w/o this CL I'd be forced to move that header also into private. This change frees us up to not have transitive exposure for types that need to be recorded.

Bug: skia:
Change-Id: Id79f1c2e44ba85e063c1360cf96c92de6397ca2b
Reviewed-on: https://skia-review.googlesource.com/17031
Commit-Queue: Mike Reed <reed@google.com>
Reviewed-by: Mike Klein <mtklein@chromium.org>
diff --git a/gm/distantclip.cpp b/gm/distantclip.cpp
index 24fbaca..fa75265 100644
--- a/gm/distantclip.cpp
+++ b/gm/distantclip.cpp
@@ -8,6 +8,7 @@
 
 #include "gm.h"
 #include "SkCanvas.h"
+#include "SkPath.h"
 #include "SkPicture.h"
 #include "SkPictureRecorder.h"