Power bookmark: Fix a jni leak for CurrencyFormatter.

PowerBookmarkShoppingItemRow is only used in test. But the production
code needs to call CurrencyFormatter.destroy, or the native side
object is leaked.

Bug: NONE
Change-Id: I46c269eb9e402835bdec316f404a32624648abcd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3213448
Reviewed-by: Theresa  <twellington@chromium.org>
Reviewed-by: Brandon Wylie <wylieb@chromium.org>
Commit-Queue: Xing Liu <xingliu@chromium.org>
Cr-Commit-Position: refs/heads/main@{#929512}

chrome/android/java/src/org/chromium/chrome/browser/bookmarks/PowerBookmarkShoppingItemRow.java

@@ -49,6 +49,7 @@ void init(ImageFetcher imageFetcher) {
         mImageFetcher = imageFetcher;
     }
 
+    // BookmarkItemRow overrides:
     @Override
     BookmarkItem setBookmarkId(BookmarkId bookmarkId, @Location int location) {
         BookmarkItem bookmarkItem = super.setBookmarkId(bookmarkId, location);
@@ -57,6 +58,12 @@ BookmarkItem setBookmarkId(BookmarkId bookmarkId, @Location int location) {
         return bookmarkItem;
     }
 
+    @Override
+    public void onDestroy() {
+        super.onDestroy();
+        if (mCurrencyFormatter != null) mCurrencyFormatter.destroy();
+    }
+
     @VisibleForTesting
     void initPriceTrackingUI(String leadImageUrl, boolean priceTrackingEnabled, long originalPrice,
             long currentPrice) {