Implement HKDF for WebCrypto (blink-side)

public/platform/WebCryptoKeyAlgorithmParams.h

Index: public/platform/WebCryptoKeyAlgorithmParams.h
diff --git a/public/platform/WebCryptoKeyAlgorithmParams.h b/public/platform/WebCryptoKeyAlgorithmParams.h
index 3450c02e427ae1c2eaeaaf52f5372e84a12a8c7a..ce4dbd4d9b306b0cc1f890182c4a10b420eebc2d 100644
--- a/public/platform/WebCryptoKeyAlgorithmParams.h
+++ b/public/platform/WebCryptoKeyAlgorithmParams.h
@@ -55,6 +55,7 @@ enum WebCryptoKeyAlgorithmParamsType {
     WebCryptoKeyAlgorithmParamsTypeAes,
     WebCryptoKeyAlgorithmParamsTypeRsaHashed,
     WebCryptoKeyAlgorithmParamsTypeEc,
+    WebCryptoKeyAlgorithmParamsTypeKdf,

[eroman, 2015/01/07 00:40:31]

Same comment as earlier.

[nharper, 2015/01/08 00:58:40]

Done.

 };
 
 class WebCryptoKeyAlgorithmParams {
@@ -206,6 +207,19 @@ private:
     const WebCryptoNamedCurve m_namedCurve;
 };
 
+class WebCryptoKdfKeyAlgorithmParams : public WebCryptoKeyAlgorithmParams {

[eroman, 2015/01/07 00:40:31]

Same comment as earlier. I don't think there is value in having an empty params
structure.

[nharper, 2015/01/08 00:58:39]

Done.

+public:
+    virtual WebCryptoKeyAlgorithmParamsType type() const
+    {
+        return WebCryptoKeyAlgorithmParamsTypeKdf;
+    }
+
+    virtual void writeToDictionary(WebCryptoKeyAlgorithmDictionary* dict) const
+    {
+        return;
+    }
+};
+
 } // namespace blink
 
 #endif