[webcrypto] Add the KeyAlgorithm interface.

Source/modules/crypto/KeyAlgorithm.idl

Index: Source/modules/crypto/KeyAlgorithm.idl
diff --git a/Source/modules/crypto/Algorithm.idl b/Source/modules/crypto/KeyAlgorithm.idl
similarity index 94%
rename from Source/modules/crypto/Algorithm.idl
rename to Source/modules/crypto/KeyAlgorithm.idl
index a1373bde07516fd21f8e1a7f5cf2b58c888cbc5a..b8188c9fd38d5a457d2371a77efe80c83b8d96b2 100644
--- a/Source/modules/crypto/Algorithm.idl
+++ b/Source/modules/crypto/KeyAlgorithm.idl
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2013 Google Inc. All rights reserved.
+ * Copyright (C) 2014 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
@@ -29,8 +29,9 @@
  */
 
 [
+    Custom=Wrap,
     WillBeGarbageCollected,
     NoInterfaceObject
-] interface Algorithm {
+] interface KeyAlgorithm {
     readonly attribute DOMString name;
 };