Make LevelDBObserver an associated interface to LevelDBWrapper.

content/browser/storage_partition_impl.cc

 // Copyright (c) 2012 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/storage_partition_impl.h"
 
 #include <stddef.h>
 
 #include <set>
 #include <vector>
@@ skipping 556 matching lines @@
 PaymentAppContextImpl* StoragePartitionImpl::GetPaymentAppContext() {
   return payment_app_context_.get();
 }
 
 BroadcastChannelProvider* StoragePartitionImpl::GetBroadcastChannelProvider() {
   return broadcast_channel_provider_.get();
 }
 
 void StoragePartitionImpl::OpenLocalStorage(
     const url::Origin& origin,
-    mojom::LevelDBObserverPtr observer,
     mojo::InterfaceRequest<mojom::LevelDBWrapper> request) {
-  dom_storage_context_->OpenLocalStorage(
-      origin, std::move(observer), std::move(request));
+  dom_storage_context_->OpenLocalStorage(origin, std::move(request));
 }
 
 void StoragePartitionImpl::ClearDataImpl(
     uint32_t remove_mask,
     uint32_t quota_storage_remove_mask,
     const GURL& storage_origin,
     const OriginMatcherFunction& origin_matcher,
     const CookieMatcherFunction& cookie_matcher,
     net::URLRequestContextGetter* rq_context,
     const base::Time begin,
@@ skipping 302 matching lines @@
   media_url_request_context_ = media_url_request_context;
 }
 
 void StoragePartitionImpl::GetQuotaSettings(
     const storage::OptionalQuotaSettingsCallback& callback) {
   GetContentClient()->browser()->GetQuotaSettings(browser_context_, this,
                                                   callback);
 }
 
 }  // namespace content