Move SkOSPath out of include/core.

It is moved to src/utils. It is almost a tool, but has two uses in
src/ports.

The existing SkOSFile.cpp is left empty for the time being since it is
mentioned in Chromium's BUILD.gn for Skia.

Change-Id: I3bb7f7c4214359eb6ab906bfe76737d20bf1d6c7
Reviewed-on: https://skia-review.googlesource.com/4536
Reviewed-by: Mike Klein <mtklein@chromium.org>
Commit-Queue: Ben Wagner <bungeman@google.com>
diff --git a/tests/BadIcoTest.cpp b/tests/BadIcoTest.cpp
index a0664f1..229e9bc 100644
--- a/tests/BadIcoTest.cpp
+++ b/tests/BadIcoTest.cpp
@@ -7,10 +7,12 @@
 
 #include "Resources.h"
 #include "Test.h"
+
 #include "SkBitmap.h"
 #include "SkCodec.h"
-#include "SkStream.h"
 #include "SkOSFile.h"
+#include "SkOSPath.h"
+#include "SkStream.h"
 
 DEF_TEST(BadImage, reporter) {
     const char* const badImages [] = {