Revert "Revert "SkTypes: extract SkTo""

This reverts commit fdcfb8b7c23fbf18f872d2c31d27978235033876.

> Original change's description:
> > SkTypes: extract SkTo
> >
> > Change-Id: I8de790d5013db2105ad885fa2683303d7c250b09
> > Reviewed-on: https://skia-review.googlesource.com/133620
> > Reviewed-by: Mike Klein <mtklein@google.com>

Change-Id: Ida74fbc5c21248a724a5edbf9fae18a33bcb23aa
Reviewed-on: https://skia-review.googlesource.com/134506
Reviewed-by: Mike Klein <mtklein@google.com>
Commit-Queue: Hal Canary <halcanary@google.com>
diff --git a/include/private/SkTDArray.h b/include/private/SkTDArray.h
index b030dc5..dd3212d 100644
--- a/include/private/SkTDArray.h
+++ b/include/private/SkTDArray.h
@@ -1,4 +1,3 @@
-
 /*
  * Copyright 2006 The Android Open Source Project
  *
@@ -10,8 +9,9 @@
 #ifndef SkTDArray_DEFINED
 #define SkTDArray_DEFINED
 
-#include "SkTypes.h"
 #include "SkMalloc.h"
+#include "SkTo.h"
+#include "SkTypes.h"
 
 template <typename T> class SkTDArray {
 public: