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/src/effects/SkDashPathEffect.cpp b/src/effects/SkDashPathEffect.cpp
index c1f5f0a..8301592 100644
--- a/src/effects/SkDashPathEffect.cpp
+++ b/src/effects/SkDashPathEffect.cpp
@@ -6,12 +6,14 @@
  */
 
 #include "SkDashPathEffect.h"
+
 #include "SkDashImpl.h"
 #include "SkDashPathPriv.h"
 #include "SkFlattenablePriv.h"
 #include "SkReadBuffer.h"
-#include "SkWriteBuffer.h"
 #include "SkStrokeRec.h"
+#include "SkTo.h"
+#include "SkWriteBuffer.h"
 
 SkDashImpl::SkDashImpl(const SkScalar intervals[], int count, SkScalar phase)
         : fPhase(0)