Move shell service to toplevel shell namespace

components/leveldb/leveldb_app.cc

Index: components/leveldb/leveldb_app.cc
diff --git a/components/leveldb/leveldb_app.cc b/components/leveldb/leveldb_app.cc
index 192c8ff58395afdf2d2d24639386080a97e4955f..661262571370a2fcdd392a62b380aa87029364c9 100644
--- a/components/leveldb/leveldb_app.cc
+++ b/components/leveldb/leveldb_app.cc
@@ -14,18 +14,18 @@ LevelDBApp::LevelDBApp() {}
 
 LevelDBApp::~LevelDBApp() {}
 
-void LevelDBApp::Initialize(mojo::Connector* connector,
-                            const mojo::Identity& identity,
+void LevelDBApp::Initialize(shell::Connector* connector,
+                            const shell::Identity& identity,
                             uint32_t id) {
   tracing_.Initialize(connector, identity.name());
 }
 
-bool LevelDBApp::AcceptConnection(mojo::Connection* connection) {
+bool LevelDBApp::AcceptConnection(shell::Connection* connection) {
   connection->AddInterface<LevelDBService>(this);
   return true;
 }
 
-void LevelDBApp::Create(mojo::Connection* connection,
+void LevelDBApp::Create(shell::Connection* connection,
                         leveldb::LevelDBServiceRequest request) {
   if (!service_)
     service_.reset(