Re-add SkPictureStateTree::Iterator::draw() SaveFlags.

src/core/SkPictureStateTree.cpp

Index: src/core/SkPictureStateTree.cpp
diff --git a/src/core/SkPictureStateTree.cpp b/src/core/SkPictureStateTree.cpp
index 891d04ca21bc4ae7a9b11b679afb7b2434c2fba6..21ae3cb9f09f466036057ab2b1f9c640cea7d962 100644
--- a/src/core/SkPictureStateTree.cpp
+++ b/src/core/SkPictureStateTree.cpp
@@ -124,7 +124,10 @@ uint32_t SkPictureStateTree::Iterator::draw() {
     Node* targetNode = draw->fNode;
 
     if (fSave) {
-        fCanvas->save();
+        // FIXME: the save below depends on soon-to-be-deprecated
+        // SaveFlags behavior: it relies on matrix changes persisting
+        // after restore.
+        fCanvas->save(SkCanvas::kClip_SaveFlag);
         fSave = false;
     }