Report repetition count in SkCodec

gm/animatedGif.cpp

Index: gm/animatedGif.cpp
diff --git a/gm/animatedGif.cpp b/gm/animatedGif.cpp
index 6f7f0ddd1b2fe02885240e091a52a704813d47c5..7b5f50c39528b2dd3bd49e89a80899283d08e17e 100644
--- a/gm/animatedGif.cpp
+++ b/gm/animatedGif.cpp
@@ -129,7 +129,10 @@ private:
         }
 
         fFrame = 0;
-        fFrameInfos = fCodec->getFrameInfo();
+        if (!fCodec->getFrameInfo(&fFrameInfos, nullptr)) {
+            SkDebugf("%s is not animated", FLAGS_animatedGif[0]);
+            return false;
+        }
         fTotalFrames = fFrameInfos.size();
         return true;
     }