Rewriting path writer

src/pathops/SkPathOpsTightBounds.cpp

Index: src/pathops/SkPathOpsTightBounds.cpp
diff --git a/src/pathops/SkPathOpsTightBounds.cpp b/src/pathops/SkPathOpsTightBounds.cpp
index e3a3108bd72b5a942728028dcc485e3a6cf4ed0b..60f18cfbbc7842c15a212c6d12a14ce451937a55 100644
--- a/src/pathops/SkPathOpsTightBounds.cpp
+++ b/src/pathops/SkPathOpsTightBounds.cpp
@@ -23,7 +23,7 @@ bool TightBounds(const SkPath& path, SkRect* result) {
     } else {
         workingPath = &path;
     }
-    SkOpEdgeBuilder builder(*workingPath, &contour, &globalState);
+    SkOpEdgeBuilder builder(*workingPath, contourList, &globalState);
     if (!builder.finish()) {
         return false;
     }