Reland "Revert "Use flat version of path-direction enum""

This reverts commit 1792b19485cacb0c950a3c0ea0aab763a8d43176.

Reason for revert: need to update legacy_convexity, still used by google3

Original change's description:
> Revert "Revert "Use flat version of path-direction enum""
> 
> This reverts commit 0dacc6b7d3027e8181311a61f7ca798be52a0250.
> 
> Change-Id: Ie103e9f36b07e4ee256a3688a4decf3a6dd74314
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/255832
> Auto-Submit: Mike Reed <reed@google.com>
> Reviewed-by: Mike Reed <reed@google.com>
> Commit-Queue: Mike Reed <reed@google.com>

TBR=reed@google.com

Change-Id: I0ecea0eb8a237298c6b908cc4bfd1cacdfc5b900
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/255976
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
diff --git a/samplecode/SampleClock.cpp b/samplecode/SampleClock.cpp
index f7332ce..a90ecf1 100644
--- a/samplecode/SampleClock.cpp
+++ b/samplecode/SampleClock.cpp
@@ -160,7 +160,7 @@
 #ifdef USE_PATH
         path.reset();
         path.arcTo(rect, 0, 0, false);
-        path.addOval(rect, SkPathDirection::kCCW);
+        path.addOval(rect, SkPath::kCCW_Direction);
         path.arcTo(rect, 360, 0, true);
         canvas->drawPath(path, paintFill);
 #else
@@ -170,7 +170,7 @@
 #ifdef USE_PATH
         path.reset();
         path.arcTo(rect, 0, 0, false);
-        path.addOval(rect, SkPathDirection::kCCW);
+        path.addOval(rect, SkPath::kCCW_Direction);
         path.arcTo(rect, 360, 0, true);
         canvas->drawPath(path, paintStroke);
 #else
@@ -180,7 +180,7 @@
 #ifdef USE_PATH
         rect = SkRect::MakeLTRB(-6, -6, 6, 6);
         path.arcTo(rect, 0, 0, false);
-        path.addOval(rect, SkPathDirection::kCCW);
+        path.addOval(rect, SkPath::kCCW_Direction);
         path.arcTo(rect, 360, 0, true);
         canvas->drawPath(path, paintFill);
 #else
@@ -196,7 +196,7 @@
 #ifdef USE_PATH
         path.reset();
         path.arcTo(rect, 0, 0, false);
-        path.addOval(rect, SkPathDirection::kCCW);
+        path.addOval(rect, SkPath::kCCW_Direction);
         path.arcTo(rect, 360, 0, true);
         canvas->drawPath(path, paintStroke);
 #else