SkTArray to move when moving.

This updates SkTArray to move elements when possible, instead of always
copying them.

TBR=reed
Agreed moving is good. This should also become private.

Committed: https://skia.googlesource.com/skia/+/3c69348e725131150e4ab962dec1b3ff1148a6bd

Review URL: https://codereview.chromium.org/1672063002
diff --git a/include/ports/SkFontMgr_indirect.h b/include/ports/SkFontMgr_indirect.h
index 81cd773..9d96fee 100644
--- a/include/ports/SkFontMgr_indirect.h
+++ b/include/ports/SkFontMgr_indirect.h
@@ -70,8 +70,7 @@
 
         DataEntry() { }
 
-        // This is a move!!!
-        DataEntry(DataEntry& that)
+        DataEntry(DataEntry&& that)
             : fDataId(that.fDataId)
             , fTtcIndex(that.fTtcIndex)
             , fTypeface(that.fTypeface)