Revert "Revert "Merge remote-tracking branch 'goog/master-skia' into goog/master""

When I broke android yesterday we reverted this merge to fix the breakage.
Undoing that revert so we can pull in the fix from Skia.
diff --git a/gm/stlouisarch.cpp b/gm/stlouisarch.cpp
index 176fb4b..7b31e54 100644
--- a/gm/stlouisarch.cpp
+++ b/gm/stlouisarch.cpp
@@ -7,6 +7,7 @@
 
 #include "gm.h"
 #include "SkCanvas.h"
+#include "SkPath.h"
 #include "SkTArray.h"
 
 namespace skiagm {