Fixed an NPE with GIF image

Bug: 1164291
Change-Id: Ia933a150bde0830d23f88f33a1ebc1a78819a74f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2616807Reviewed-by: Min Qin <qinmin@chromium.org>
Commit-Queue: Shakti Sahu <shaktisahu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#841522}

chrome/browser/video_tutorials/internal/android/java/src/org/chromium/chrome/browser/video_tutorials/iph/VideoIPHCoordinatorImpl.java

@@ -84,7 +84,8 @@ public class VideoIPHCoordinatorImpl implements VideoIPHCoordinator {
                 ImageFetcher.VIDEO_TUTORIALS_IPH_UMA_CLIENT_NAME, widthPx, heightPx);
         if (useAnimatedGifUrl) {
             mImageFetcher.fetchGif(params, gifImage -> {
-                BaseGifDrawable baseGifDrawable = new BaseGifDrawable(gifImage, Config.ARGB_8888);
+                BaseGifDrawable baseGifDrawable =
+                        gifImage == null ? null : new BaseGifDrawable(gifImage, Config.ARGB_8888);
                 consumer.onResult(baseGifDrawable);
             });
         } else {