shim old locker interface.

lib/v8/c/locker.rb

@@ -0,0 +1,18 @@
+module V8
+  module C
+    # Shim to support the old style locking syntax. We don't currently
+    # deprecate this because it might make a comeback at some point.
+    #
+    # to synchronize access to V8, and to associate V8 with this thread:
+    #
+    #     Locker() do
+    #       #... interact with v8
+    #     end
+    def self.Locker
+      lock = Locker.new
+      yield
+    ensure
+      lock.delete
+    end
+  end
+end