Fix lifetime of leveldb::MojoEnv instances.

content/browser/dom_storage/local_storage_context_mojo.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/browser/dom_storage/local_storage_context_mojo.h"
 
 #include "base/memory/ptr_util.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/strings/string_number_conversions.h"
 #include "components/leveldb/public/cpp/util.h"
@@ skipping 350 matching lines @@
         kStorageOpenHistogramName,
         static_cast<int>(LocalStorageOpenHistogram::DIRECTORY_OPEN_FAILED),
         static_cast<int>(LocalStorageOpenHistogram::MAX));
     OnDatabaseOpened(false, leveldb::mojom::DatabaseError::OK);
     return;
   }
 
   // Now that we have a directory, connect to the LevelDB service and get our
   // database.
   file_service_connection_->GetInterface(&leveldb_service_);
-  leveldb_service_->SetEnvironmentName("LevelDBEnv.LocalStorage");
 
   // We might still need to use the directory, so create a clone.
   filesystem::mojom::DirectoryPtr directory_clone;
   directory_->Clone(MakeRequest(&directory_clone));
 
   auto options = leveldb::mojom::OpenOptions::New();
   options->create_if_missing = true;
   leveldb_service_->OpenWithOptions(
       std::move(options), std::move(directory_clone), "leveldb",
       MakeRequest(&database_),
@@ skipping 207 matching lines @@
   for (const auto& info : usage) {
     url::Origin origin_candidate(info.origin);
     if (!origin_candidate.IsSameOriginWith(origin) &&
         origin_candidate.IsSamePhysicalOriginWith(origin))
       DeleteStorage(origin_candidate);
   }
   DeleteStorage(origin);
 }
 
 }  // namespace content