Add blob-writing functionality [as yet un-called] to IDB's backend.

content/browser/indexed_db/indexed_db_fake_backing_store.cc

 // Copyright 2013 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.
 
 #include "content/browser/indexed_db/indexed_db_fake_backing_store.h"
 
 #include "base/files/file_path.h"
 #include "base/memory/scoped_ptr.h"
 
 namespace content {
 
 IndexedDBFakeBackingStore::IndexedDBFakeBackingStore()
     : IndexedDBBackingStore(NULL,
                             GURL("http://localhost:81"),
                             base::FilePath(),
+                            NULL,
                             scoped_ptr<LevelDBDatabase>(),
                             scoped_ptr<LevelDBComparator>(),
                             NULL) {}
 
 IndexedDBFakeBackingStore::IndexedDBFakeBackingStore(
     IndexedDBFactory* factory,
     base::TaskRunner* task_runner)
     : IndexedDBBackingStore(factory,
                             GURL("http://localhost:81"),
                             base::FilePath(),
+                            NULL,
                             scoped_ptr<LevelDBDatabase>(),
                             scoped_ptr<LevelDBComparator>(),
                             task_runner) {}
 
 IndexedDBFakeBackingStore::~IndexedDBFakeBackingStore() {}
 
 std::vector<base::string16> IndexedDBFakeBackingStore::GetDatabaseNames(
     leveldb::Status* s) {
   *s = leveldb::Status::OK();
   return std::vector<base::string16>();
@@ skipping 149 matching lines @@
 void IndexedDBFakeBackingStore::FakeTransaction::Begin() {}
 leveldb::Status IndexedDBFakeBackingStore::FakeTransaction::Commit() {
   if (result_)
     return leveldb::Status::OK();
   else
     return leveldb::Status::IOError("test error");
 }
 void IndexedDBFakeBackingStore::FakeTransaction::Rollback() {}
 
 }  // namespace content