Refactor the interface for generating keys.

content/child/webcrypto/openssl/aes_key_openssl.h

Index: content/child/webcrypto/openssl/aes_key_openssl.h
diff --git a/content/child/webcrypto/openssl/aes_key_openssl.h b/content/child/webcrypto/openssl/aes_key_openssl.h
index 6c6b5ff546b68b2e5366f088b723f5b5bf989917..c1186d86dfac4cd42f654ccecaa7b083158a1038 100644
--- a/content/child/webcrypto/openssl/aes_key_openssl.h
+++ b/content/child/webcrypto/openssl/aes_key_openssl.h
@@ -28,13 +28,10 @@ class AesAlgorithm : public AlgorithmImplementation {
   // algorithms (supports usages for: encrypt, decrypt, wrap, unwrap).
   explicit AesAlgorithm(const std::string& jwk_suffix);
 
-  virtual Status VerifyKeyUsagesBeforeGenerateKey(
-      blink::WebCryptoKeyUsageMask usage_mask) const OVERRIDE;
-
-  virtual Status GenerateSecretKey(const blink::WebCryptoAlgorithm& algorithm,
-                                   bool extractable,
-                                   blink::WebCryptoKeyUsageMask usage_mask,
-                                   blink::WebCryptoKey* key) const OVERRIDE;
+  virtual Status GenerateKey(const blink::WebCryptoAlgorithm& algorithm,
+                             bool extractable,
+                             blink::WebCryptoKeyUsageMask usage_mask,
+                             GenerateKeyResult* result) const OVERRIDE;
 
   virtual Status VerifyKeyUsagesBeforeImportKey(
       blink::WebCryptoKeyFormat format,