Enable mojo localstorage to actually store on disk.

content/browser/dom_storage/dom_storage_context_wrapper.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/dom_storage/dom_storage_context_wrapper.h"
 
 #include <string>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 116 matching lines @@
     base::FilePath storage_dir;
     if (!profile_path.empty())
       storage_dir = local_partition_path.AppendASCII(kLocalStorageDirectory);
     // TODO(michaeln): Enable writing to disk when db is versioned,
     // for now using an empty subdirectory to use an in-memory db.
     // subdirectory_(subdirectory),
     mojo_state_.reset(new LocalStorageContextMojo(
         connector, context_->task_runner(),
         data_path.empty() ? data_path
                           : data_path.AppendASCII(kLocalStorageDirectory),
-        base::FilePath() /* storage_dir */));
+        storage_dir));
   }
 
   if (base::FeatureList::IsEnabled(features::kMemoryCoordinator)) {
     base::MemoryCoordinatorClientRegistry::GetInstance()->Register(this);
   } else {
     memory_pressure_listener_.reset(new base::MemoryPressureListener(
         base::Bind(&DOMStorageContextWrapper::OnMemoryPressure, this)));
   }
 }
 
@@ skipping 160 matching lines @@
     GetLocalStorageUsageCallback callback,
     std::vector<LocalStorageUsageInfo> usage) {
   context_->task_runner()->PostShutdownBlockingTask(
       FROM_HERE, DOMStorageTaskRunner::PRIMARY_SEQUENCE,
       base::Bind(&GetLocalStorageUsageHelper, base::Passed(&usage),
                  base::RetainedRef(base::ThreadTaskRunnerHandle::Get()),
                  base::RetainedRef(context_), callback));
 }
 
 }  // namespace content