[IndexedDB] Hold referenced to IDB::put blobs in the IDBRequest

content/browser/indexed_db/indexed_db_dispatcher_host.h

Index: content/browser/indexed_db/indexed_db_dispatcher_host.h
diff --git a/content/browser/indexed_db/indexed_db_dispatcher_host.h b/content/browser/indexed_db/indexed_db_dispatcher_host.h
index c64c71f5a9966d9f8271f203bf261d9c278b829d..bfcbca291bf137dbd3a5085e1d17a26c711ae6aa 100644
--- a/content/browser/indexed_db/indexed_db_dispatcher_host.h
+++ b/content/browser/indexed_db/indexed_db_dispatcher_host.h
@@ -33,6 +33,7 @@ class Origin;
 }
 
 namespace content {
+class BlobDispatcherHost;
 class IndexedDBBlobInfo;
 class IndexedDBContextImpl;
 
@@ -66,6 +67,11 @@ class CONTENT_EXPORT IndexedDBDispatcherHost
   }
   int ipc_process_id() const { return ipc_process_id_; }
 
+  void SetBlobDispatcherHost(scoped_refptr<BlobDispatcherHost> host);
+
+  // Decrements the refcount for the given blob for this renderer.
+  void AckBlobRecievedFromIDB(const std::string& uuid);
+
   std::string HoldBlobData(const IndexedDBBlobInfo& blob_info);
   void DropBlobData(const std::string& uuid);
 
@@ -109,6 +115,8 @@ class CONTENT_EXPORT IndexedDBDispatcherHost
 
   scoped_refptr<IndexedDBContextImpl> indexed_db_context_;
   scoped_refptr<ChromeBlobStorageContext> blob_storage_context_;
+  // TODO(dmurph): Remove once blobs are mojo'd.

[pwnall, 2017/04/21 01:39:22]

Would it be worth pointing to this CL in the TODO? IIUC, all the plumbing here
could go away if mojo can hang onto the Blobs.

+  scoped_refptr<BlobDispatcherHost> blob_dispatcher_host_;
   scoped_refptr<base::SequencedTaskRunner> idb_runner_;
 
   // Maps blob uuid to a pair (handle, ref count). Entry is added and/or count