Eliminate mojo::Shell client lib class

components/filesystem/public/cpp/prefs/pref_service_factory.h

Index: components/filesystem/public/cpp/prefs/pref_service_factory.h
diff --git a/components/filesystem/public/cpp/prefs/pref_service_factory.h b/components/filesystem/public/cpp/prefs/pref_service_factory.h
index bff39083a6d8920ab069336890a17fbb422e40d6..23ee9ff30334130f52ff5edb416cfb0fb24e8fa6 100644
--- a/components/filesystem/public/cpp/prefs/pref_service_factory.h
+++ b/components/filesystem/public/cpp/prefs/pref_service_factory.h
@@ -9,7 +9,7 @@
 #include "components/prefs/pref_service.h"
 
 namespace mojo {
-class Shell;
+class Connector;
 }
 
 class PrefRegistry;
@@ -19,7 +19,7 @@ namespace filesystem {
 // This factory method creates a PrefService for the local process based on the
 // preference registry passed in. This PrefService will synchronize with a JSON
 // file in the mojo:filesystem.
-scoped_ptr<PrefService> CreatePrefService(mojo::Shell* shell,
+scoped_ptr<PrefService> CreatePrefService(mojo::Connector* connector,
                                           PrefRegistry* registry);
 
 }  // namespace filesystem