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

This is a SkPictureStateTree-only revert of r14253.

https://codereview.chromium.org/241453003

(It introduced ChromeOS regressions and the later r14319 fix got
reverted for different reasons).

R=bsalomon@google.com

Review URL: https://codereview.chromium.org/250803006

git-svn-id: http://skia.googlecode.com/svn/trunk@14384 2bbb7eff-a529-9590-31e7-b0007b416f81

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;
     }