Implement the renderer side of the mojo based local storage implementation.

content/browser/leveldb_wrapper_impl.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/leveldb_wrapper_impl.h"
 
 #include "base/bind.h"
 
 namespace content {
 
 LevelDBWrapperImpl::LevelDBWrapperImpl(
     const std::string& prefix, const base::Closure& no_bindings_callback)
     : prefix_(prefix), no_bindings_callback_(no_bindings_callback) {
   bindings_.set_connection_error_handler(base::Bind(
       &LevelDBWrapperImpl::OnConnectionError, base::Unretained(this)));
 }
 
 void LevelDBWrapperImpl::Bind(mojo::InterfaceRequest<LevelDBWrapper> request) {
   bindings_.AddBinding(this, std::move(request));
 }
 
 LevelDBWrapperImpl::~LevelDBWrapperImpl() {
 }
 
 void LevelDBWrapperImpl::Put(mojo::Array<uint8_t> key,
                              mojo::Array<uint8_t> value,
                              const mojo::String& source,
                              const PutCallback& callback) {
+  // TODO(jam): call observers before running callback.
 }
 
 void LevelDBWrapperImpl::Delete(mojo::Array<uint8_t> key,
                                 const mojo::String& source,
                                 const DeleteCallback& callback) {
+  // TODO(jam): call observers before running callback.
 }
 
 void LevelDBWrapperImpl::DeleteAll(LevelDBObserverPtr observer,
                                    const mojo::String& source,
                                    const DeleteAllCallback& callback) {
   // TODO(jam): store observer and call it when changes occur.
+  // TODO(jam): call observers before running callback.
 }
 
 void LevelDBWrapperImpl::Get(mojo::Array<uint8_t> key,
                              const GetCallback& callback) {
 }
 
 void LevelDBWrapperImpl::GetAll(LevelDBObserverPtr observer,
                                 const GetAllCallback& callback) {
   // TODO(jam): store observer and call it when changes occur.
 }
 
 void LevelDBWrapperImpl::OnConnectionError() {
   if (!bindings_.empty())
     return;
 
   no_bindings_callback_.Run();
 }
 
 }  // namespace content