add pathops tight bounds; conform path ops' gyp to unit tests

include/pathops/SkPathOps.h

Index: include/pathops/SkPathOps.h
diff --git a/include/pathops/SkPathOps.h b/include/pathops/SkPathOps.h
index a98f4ea4d6d55f5d3b891c426d165bf8a79c6f05..ba18f4ba72f50738e4d7f09618db2db3e6c5ba80 100644
--- a/include/pathops/SkPathOps.h
+++ b/include/pathops/SkPathOps.h
@@ -10,6 +10,7 @@
 #include "SkPreConfig.h"
 
 class SkPath;
+struct SkRect;
 
 // FIXME: move everything below into the SkPath class
 /**
@@ -54,4 +55,12 @@ bool SK_API Op(const SkPath& one, const SkPath& two, SkPathOp op, SkPath* result
   */
 bool SK_API Simplify(const SkPath& path, SkPath* result);
 
+/** Set the resulting rectangle to the tight bounds of the path.
+
+    @param path The path measured.
+    @param result The tight bounds of the path.
+    @return True if the bounds could be computed.
+  */
+bool SK_API TightBounds(const SkPath& path, SkRect* result);
+
 #endif