WebCrypto: Implement crypto.subtle.deriveKey (chromium-side).

content/child/webcrypto/algorithm_implementation.cc

Index: content/child/webcrypto/algorithm_implementation.cc
diff --git a/content/child/webcrypto/algorithm_implementation.cc b/content/child/webcrypto/algorithm_implementation.cc
index 52937a5422f051e9dc40545e84c871b95a46dea3..4b07b84d7b30353c6699e7c1abb53c0c61ac7cd9 100644
--- a/content/child/webcrypto/algorithm_implementation.cc
+++ b/content/child/webcrypto/algorithm_implementation.cc
@@ -63,7 +63,8 @@ Status AlgorithmImplementation::GenerateKey(
 Status AlgorithmImplementation::DeriveBits(
     const blink::WebCryptoAlgorithm& algorithm,
     const blink::WebCryptoKey& base_key,
-    unsigned int length_bits,
+    bool has_optional_length_bits,
+    unsigned int optional_length_bits,
     std::vector<uint8_t>* derived_bytes) const {
   return Status::ErrorUnsupported();
 }