Revert "SkTypes: extract SkTo"

This reverts commit 2a2f67592602b18527bc3fd449132d420cd5b62e.

Reason for revert: this appears to be what is holding up the Chrome roll.

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>

TBR=mtklein@google.com,halcanary@google.com

No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Change-Id: Iafd738aedfb679a23c061a51afe4b98a8d4cdfae
Reviewed-on: https://skia-review.googlesource.com/134504
Reviewed-by: Hal Canary <halcanary@google.com>
Commit-Queue: Hal Canary <halcanary@google.com>
diff --git a/src/gpu/vk/GrVkGpu.cpp b/src/gpu/vk/GrVkGpu.cpp
index dd98125..a999311 100644
--- a/src/gpu/vk/GrVkGpu.cpp
+++ b/src/gpu/vk/GrVkGpu.cpp
@@ -16,6 +16,7 @@
 #include "GrPipeline.h"
 #include "GrRenderTargetPriv.h"
 #include "GrTexturePriv.h"
+
 #include "GrVkAMDMemoryAllocator.h"
 #include "GrVkCommandBuffer.h"
 #include "GrVkGpuCommandBuffer.h"
@@ -32,13 +33,15 @@
 #include "GrVkTextureRenderTarget.h"
 #include "GrVkTransferBuffer.h"
 #include "GrVkVertexBuffer.h"
+
 #include "SkConvertPixels.h"
 #include "SkMipMap.h"
-#include "SkSLCompiler.h"
-#include "SkTo.h"
+
 #include "vk/GrVkInterface.h"
 #include "vk/GrVkTypes.h"
 
+#include "SkSLCompiler.h"
+
 #if !defined(SK_BUILD_FOR_WIN)
 #include <unistd.h>
 #endif // !defined(SK_BUILD_FOR_WIN)