Remove some duplicated code, and make rsa_key_nss.cc more closely match rsa_key_openssl.cc.

content/child/webcrypto/webcrypto_util.h

Index: content/child/webcrypto/webcrypto_util.h
diff --git a/content/child/webcrypto/webcrypto_util.h b/content/child/webcrypto/webcrypto_util.h
index 1e6778c2fec5ce452d66db51dee51c886b643e30..a3a7143e55138242f3748582da5ee50d11d4e5af 100644
--- a/content/child/webcrypto/webcrypto_util.h
+++ b/content/child/webcrypto/webcrypto_util.h
@@ -42,11 +42,6 @@ CONTENT_EXPORT Status GetWebCryptoUsagesFromJwkKeyOps(
 base::ListValue* CreateJwkKeyOpsFromWebCryptoUsages(
     blink::WebCryptoKeyUsageMask usage_mask);
 
-// Returns the "hash" param for an algorithm if it exists, otherwise returns
-// a null algorithm.
-blink::WebCryptoAlgorithm GetInnerHashAlgorithm(
-    const blink::WebCryptoAlgorithm& algorithm);
-
 // Creates a WebCryptoAlgorithm without any parameters.
 CONTENT_EXPORT blink::WebCryptoAlgorithm CreateAlgorithm(
     blink::WebCryptoAlgorithmId id);