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

storage/browser/blob/blob_data_builder.cc

Index: storage/browser/blob/blob_data_builder.cc
diff --git a/storage/browser/blob/blob_data_builder.cc b/storage/browser/blob/blob_data_builder.cc
index d352f13bd35df6ce84f401226da15cda21a3e3c1..204a4e818752d12824de737fe02922eb39f1146f 100644
--- a/storage/browser/blob/blob_data_builder.cc
+++ b/storage/browser/blob/blob_data_builder.cc
@@ -57,6 +57,9 @@ uint64_t BlobDataBuilder::GetFutureFileID(const DataElement& element) {
 }
 
 BlobDataBuilder::BlobDataBuilder(const std::string& uuid) : uuid_(uuid) {}
+
+BlobDataBuilder::BlobDataBuilder(BlobDataBuilder&&) = default;
+BlobDataBuilder& BlobDataBuilder::operator=(BlobDataBuilder&&) = default;
 BlobDataBuilder::~BlobDataBuilder() {}
 
 void BlobDataBuilder::AppendIPCDataElement(const DataElement& ipc_data) {