Wrap large IndexedDB values into Blobs before writing to LevelDB.

third_party/WebKit/Source/modules/indexeddb/IDBValue.cpp

Index: third_party/WebKit/Source/modules/indexeddb/IDBValue.cpp
diff --git a/third_party/WebKit/Source/modules/indexeddb/IDBValue.cpp b/third_party/WebKit/Source/modules/indexeddb/IDBValue.cpp
index ae58020b4a07f5f4deae9b0aedb131f474a28acd..3f7e788bee4c0d4ce4aa79155feae1739a409003 100644
--- a/third_party/WebKit/Source/modules/indexeddb/IDBValue.cpp
+++ b/third_party/WebKit/Source/modules/indexeddb/IDBValue.cpp
@@ -60,6 +60,13 @@ IDBValue::IDBValue(const IDBValue* value,
   }
 }
 
+IDBValue::IDBValue(PassRefPtr<SharedBuffer> unwrapped_data,
+                   std::unique_ptr<Vector<RefPtr<BlobDataHandle>>> blob_data,
+                   std::unique_ptr<Vector<WebBlobInfo>> blob_info)
+    : data_(std::move(unwrapped_data)),
+      blob_data_(std::move(blob_data)),
+      blob_info_(std::move(blob_info)) {}
+
 IDBValue::~IDBValue() {
   if (isolate_)
     isolate_->AdjustAmountOfExternalAllocatedMemory(-external_allocated_size_);