Don't add change listeners to pixelRefs in DDL mode

Change-Id: I1ddfec1e0d697dd4ed183c304514b14c89aca11d
Reviewed-on: https://skia-review.googlesource.com/115400
Reviewed-by: Greg Daniel <egdaniel@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
diff --git a/src/gpu/GrProxyProvider.h b/src/gpu/GrProxyProvider.h
index 2f452b4..76f0ae9 100644
--- a/src/gpu/GrProxyProvider.h
+++ b/src/gpu/GrProxyProvider.h
@@ -236,10 +236,9 @@
     void removeAllUniqueKeys();
 
     /**
-     * Helper function for callers who are wrapping a bitmap into an SkImage so they know whether or
-     * not that bitmap should be copied or not.
+     * Are we currently recording a DDL?
      */
-    bool mutableBitmapsNeedCopy() const { return !SkToBool(fResourceProvider); }
+    bool recordingDDL() const { return !SkToBool(fResourceProvider); }
 
 private:
     friend class GrAHardwareBufferImageGenerator; // for createWrapped