#189 - Fix legacy file storage

lib/google/api_client/auth/file_storage.rb

@@ -29,12 +29,10 @@ module Google
     #
     class FileStorage
 
-      attr_accessor :storage,
-                    :path
+      attr_accessor :storage
 
       def initialize(path)
-        @path = path
-        store = Google::APIClient::FileStore.new(@path)
+        store = Google::APIClient::FileStore.new(path)
         @storage = Google::APIClient::Storage.new(store)
         @storage.authorize
       end
@@ -54,8 +52,7 @@ module Google
       #    Optional authorization instance. If not provided, the authorization
       #    already associated with this instance will be written.
       def write_credentials(auth=nil)
-        self.authorization = auth unless auth.nil?
-        storage.write_credentials(self.authorization)
+        storage.write_credentials(auth)
       end
     end
   end

lib/google/api_client/auth/installed_app.rb

@@ -77,7 +77,7 @@ module Google
       ##
       # Request authorization. Opens a browser and waits for response.
       #
-      # @param [Google::APIClient::FileStorage] storage
+      # @param [Google::APIClient::Storage] storage
       #  Optional object that responds to :write_credentials, used to serialize
       #  the OAuth 2 credentials after completing the flow.
       #