WebCrypto: Add WebKit API structure for keys.

Source/modules/crypto/Algorithm.cpp

Index: Source/modules/crypto/Algorithm.cpp
diff --git a/Source/modules/crypto/Algorithm.cpp b/Source/modules/crypto/Algorithm.cpp
index c6a9b8e3b5296b68683bbf241b1745938bba2630..a541110040a08af63d25bfa889e1237d4e28ea2f 100644
--- a/Source/modules/crypto/Algorithm.cpp
+++ b/Source/modules/crypto/Algorithm.cpp
@@ -31,19 +31,34 @@
 #include "config.h"
 #include "modules/crypto/Algorithm.h"
 
+#include "modules/crypto/AesCbcParams.h"
+#include "modules/crypto/AesKeyGenParams.h"
+
 namespace WebCore {
 
+PassRefPtr<Algorithm> Algorithm::create(const WebKit::WebCryptoAlgorithm& algorithm)
+{
+    switch (algorithm.paramsType()) {
+    case WebKit::WebCryptoAlgorithmParamsTypeNone:
+        return adoptRef(new Algorithm(algorithm));
+    case WebKit::WebCryptoAlgorithmParamsTypeAesCbcParams:
+        return AesCbcParams::create(algorithm);
+    case WebKit::WebCryptoAlgorithmParamsTypeAesKeyGenParams:
+        return AesKeyGenParams::create(algorithm);
+    }
+    ASSERT_NOT_REACHED();
+    return 0;
+}
+
 Algorithm::Algorithm(const WebKit::WebCryptoAlgorithm& algorithm)
     : m_algorithm(algorithm)
 {
     ScriptWrappable::init(this);
 }
 
-const String& Algorithm::name()
+String Algorithm::name()
 {
-    if (m_name.isNull())
-        m_name = m_algorithm.algorithmName();
-    return m_name;
+    return ASCIILiteral(m_algorithm.algorithmName());
 }
 
 } // namespace WebCore