Move shell service to toplevel shell namespace

components/filesystem/file_system_app.h

Index: components/filesystem/file_system_app.h
diff --git a/components/filesystem/file_system_app.h b/components/filesystem/file_system_app.h
index 62b2c706ecc37e8cd3a9cffdc2ad2b3b1ea56c86..fa3e2d926a4c5f5704f5d8d3ebafa3e6e99bdafb 100644
--- a/components/filesystem/file_system_app.h
+++ b/components/filesystem/file_system_app.h
@@ -20,8 +20,8 @@ class Connector;
 
 namespace filesystem {
 
-class FileSystemApp : public mojo::ShellClient,
-                      public mojo::InterfaceFactory<FileSystem> {
+class FileSystemApp : public shell::ShellClient,
+                      public shell::InterfaceFactory<FileSystem> {
  public:
   FileSystemApp();
   ~FileSystemApp() override;
@@ -30,12 +30,13 @@ class FileSystemApp : public mojo::ShellClient,
   // Gets the system specific toplevel profile directory.
   static base::FilePath GetUserDataDir();
 
-  // |mojo::ShellClient| override:
-  void Initialize(mojo::Connector* connector, const mojo::Identity& identity,
+  // |shell::ShellClient| override:
+  void Initialize(shell::Connector* connector,
+                  const shell::Identity& identity,
                   uint32_t id) override;
-  bool AcceptConnection(mojo::Connection* connection) override;
+  bool AcceptConnection(shell::Connection* connection) override;
   // |InterfaceFactory<Files>| implementation:
-  void Create(mojo::Connection* connection,
+  void Create(shell::Connection* connection,
               mojo::InterfaceRequest<FileSystem> request) override;
 
   mojo::TracingImpl tracing_;