[webcrypto] Add the KeyAlgorithm interface.

Source/modules/crypto/KeyPair.h

Index: Source/modules/crypto/KeyPair.h
diff --git a/Source/modules/crypto/KeyPair.h b/Source/modules/crypto/KeyPair.h
index 605d07fd99a0530dd11c4f362afdf857433d6e06..292c31aa53d0c0e9564db1a38a19033344470fab 100644
--- a/Source/modules/crypto/KeyPair.h
+++ b/Source/modules/crypto/KeyPair.h
@@ -43,7 +43,7 @@ namespace WebCore {
 
 class Key;
 
-class KeyPair : public RefCountedWillBeGarbageCollectedFinalized<KeyPair>,  public ScriptWrappable {
+class KeyPair : public RefCountedWillBeGarbageCollectedFinalized<KeyPair>, public ScriptWrappable {
 public:
     static PassRefPtrWillBeRawPtr<KeyPair> create(const blink::WebCryptoKey& publicKey, const blink::WebCryptoKey& privateKey);