[BlobAsync] Moving async handling into BlobStorageContext & quota out.

storage/browser/blob/blob_memory_controller.cc

Index: storage/browser/blob/blob_memory_controller.cc
diff --git a/storage/browser/blob/blob_memory_controller.cc b/storage/browser/blob/blob_memory_controller.cc
index 422cddf748963812aef5869e5d7e35cb3c10fd28..56ad7da49a4d144a896bf85f0aa8a80f63247801 100644
--- a/storage/browser/blob/blob_memory_controller.cc
+++ b/storage/browser/blob/blob_memory_controller.cc
@@ -492,10 +492,12 @@ base::WeakPtr<QuotaAllocationTask> BlobMemoryController::ReserveFileQuota(
 }
 
 void BlobMemoryController::NotifyMemoryItemsUsed(
-    std::vector<scoped_refptr<ShareableBlobDataItem>>& items) {
+    const std::vector<scoped_refptr<ShareableBlobDataItem>>& items) {
   for (const auto& item : items) {
-    DCHECK_EQ(DataElement::TYPE_BYTES, item->item()->type());
-    DCHECK_EQ(ShareableBlobDataItem::POPULATED_WITH_QUOTA, item->state());
+    if (item->item()->type() != DataElement::TYPE_BYTES ||
+        item->state() != ShareableBlobDataItem::POPULATED_WITH_QUOTA) {
+      continue;
+    }
     // We don't want to re-add the item if we're currently paging it to disk.
     if (items_paging_to_file_.find(item->item_id()) !=
         items_paging_to_file_.end()) {