Make indexed_db.mojom.BlobInfo.size a signed integer.

content/common/indexed_db/indexed_db.mojom

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // TODO: This will move to //third_party/WebKit when //content/child/indexed_db
 // is deleted but for now this will depend on //content/common types and so
 // so belongs here.
 
 module indexed_db.mojom;
 
@@ skipping 56 matching lines @@
 
 struct FileInfo {
   mojo.common.mojom.FilePath path;
   mojo.common.mojom.String16 name;
   mojo.common.mojom.Time last_modified;
 };
 
 struct BlobInfo {
   string uuid;
   mojo.common.mojom.String16 mime_type;
-  uint64 size;
+  int64 size;
   FileInfo? file;
 };
 
 struct Value {
   string bits;
   array<BlobInfo> blob_or_file_info;
 };
 
 struct ReturnValue {
   Value value;
@@ skipping 143 matching lines @@
 };
 
 interface Factory {
   GetDatabaseNames(associated Callbacks callbacks, url.mojom.Origin origin);
   Open(int32 worker_thread, associated Callbacks callbacks,
        associated DatabaseCallbacks database_callbacks, url.mojom.Origin origin,
        mojo.common.mojom.String16 name, int64 version, int64 transaction_id);
   DeleteDatabase(associated Callbacks callbacks, url.mojom.Origin origin,
                  mojo.common.mojom.String16 name);
 };