Add a program iterator to SkDeferredDisplayList

Bug: skia:9455
Change-Id: I201218174b5d6efb72f7c06766a49f6711325bd5
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/272530
Commit-Queue: Robert Phillips <robertphillips@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
diff --git a/RELEASE_NOTES.txt b/RELEASE_NOTES.txt
index da64a10..7137c17 100644
--- a/RELEASE_NOTES.txt
+++ b/RELEASE_NOTES.txt
@@ -7,6 +7,10 @@
 Milestone 82
 
 <Insert new notes here- top is most recent.>
+  * Made SkDeferredDisplayList.h officially part of the public API (i.e., moved it to
+    include/core). Also added a ProgramIterator to SkDeferredDisplayList which allows
+    clients to pre-compile some of the shaders the DDL requires.
+
   * Added two new helper methods to SkSurfaceCharacterization: createBackendFormat and
     createFBO0. These make it easier for clients to create new surface characterizations that
     differ only a little from an existing surface characterization.