IndexedDB: Ensure that blobs in unused prefetches are acked

content/browser/indexed_db/indexed_db_browsertest.cc

Index: content/browser/indexed_db/indexed_db_browsertest.cc
diff --git a/content/browser/indexed_db/indexed_db_browsertest.cc b/content/browser/indexed_db/indexed_db_browsertest.cc
index a3d036312e86a74c456c8b237ea59222493f0864..e2b419aaae1fbd4a4e43929fbe929390bc97ed30 100644
--- a/content/browser/indexed_db/indexed_db_browsertest.cc
+++ b/content/browser/indexed_db/indexed_db_browsertest.cc
@@ -413,6 +413,14 @@ IN_PROC_BROWSER_TEST_F(IndexedDBBrowserTestWithGCExposed, BlobDidAck) {
   EXPECT_EQ(0UL, blob_context->context()->blob_count());
 }
 
+IN_PROC_BROWSER_TEST_F(IndexedDBBrowserTestWithGCExposed, BlobDidAckPrefetch) {
+  SimpleTest(GetTestUrl("indexeddb", "blob_did_ack_prefetch.html"));
+  content::ChromeBlobStorageContext* blob_context =
+      ChromeBlobStorageContext::GetFor(
+          shell()->web_contents()->GetBrowserContext());
+  EXPECT_EQ(0UL, blob_context->context()->blob_count());
+}
+
 IN_PROC_BROWSER_TEST_F(IndexedDBBrowserTest, BlobsCountAgainstQuota) {
   SimpleTest(GetTestUrl("indexeddb", "blobs_use_quota.html"));
 }