Make LevelDBObserver an associated interface to LevelDBWrapper.

content/renderer/dom_storage/local_storage_cached_area.cc

 // 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.
 
 #include "content/renderer/dom_storage/local_storage_cached_area.h"
 
 #include "base/bind.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/rand_util.h"
 #include "base/strings/string16.h"
@@ skipping 39 matching lines @@
   *page_url = GURL(result[0]);
   *storage_area_id = result[1];
 }
 
 LocalStorageCachedArea::LocalStorageCachedArea(
     const url::Origin& origin,
     mojom::StoragePartitionService* storage_partition_service,
     LocalStorageCachedAreas* cached_areas)
     : origin_(origin), binding_(this),
       cached_areas_(cached_areas), weak_factory_(this) {
-  storage_partition_service->OpenLocalStorage(
-      origin_, binding_.CreateInterfacePtrAndBind(),
-      mojo::MakeRequest(&leveldb_));
+  storage_partition_service->OpenLocalStorage(origin_,
+                                              mojo::MakeRequest(&leveldb_));
+  mojom::LevelDBObserverAssociatedPtrInfo ptr_info;
+  binding_.Bind(&ptr_info, leveldb_.associated_group());
+  leveldb_->AddObserver(std::move(ptr_info));
 }
 
 LocalStorageCachedArea::~LocalStorageCachedArea() {
   cached_areas_->CacheAreaClosed(this);
 }
 
 unsigned LocalStorageCachedArea::GetLength() {
   EnsureLoaded();
   return map_->Length();
 }
@@ skipping 262 matching lines @@
 }
 
 void LocalStorageCachedArea::Reset() {
   map_ = NULL;
   ignore_key_mutations_.clear();
   ignore_all_mutations_ = false;
   weak_factory_.InvalidateWeakPtrs();
 }
 
 }  // namespace content