Reduce internal explicit SaveFlags usage.

src/core/SkPictureStateTree.cpp

Index: src/core/SkPictureStateTree.cpp
diff --git a/src/core/SkPictureStateTree.cpp b/src/core/SkPictureStateTree.cpp
index ca3032df4f909c860b20ec4a5f99a8cf3db55aa9..891d04ca21bc4ae7a9b11b679afb7b2434c2fba6 100644
--- a/src/core/SkPictureStateTree.cpp
+++ b/src/core/SkPictureStateTree.cpp
@@ -124,7 +124,7 @@ uint32_t SkPictureStateTree::Iterator::draw() {
     Node* targetNode = draw->fNode;
 
     if (fSave) {
-        fCanvas->save(SkCanvas::kClip_SaveFlag);
+        fCanvas->save();
         fSave = false;
     }
 
@@ -162,6 +162,9 @@ uint32_t SkPictureStateTree::Iterator::draw() {
                     fCanvas->restore();
                 }
                 if (targetNode != ancestor) {
+                    // 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);
                 }
             }