[webcrypto] Change HMAC key generation length from bytes to bits.

content/renderer/webcrypto/shared_crypto.cc

Index: content/renderer/webcrypto/shared_crypto.cc
diff --git a/content/renderer/webcrypto/shared_crypto.cc b/content/renderer/webcrypto/shared_crypto.cc
index b3681c36db6e1e06ac82cec3c44f855982c19afb..ff52493f2cae7fa580aaa8e74281fe837df709c5 100644
--- a/content/renderer/webcrypto/shared_crypto.cc
+++ b/content/renderer/webcrypto/shared_crypto.cc
@@ -315,8 +315,15 @@ Status GenerateSecretKey(const blink::WebCryptoAlgorithm& algorithm,
       const blink::WebCryptoHmacKeyGenParams* params =
           algorithm.hmacKeyGenParams();
       DCHECK(params);
+#ifdef WEBCRYPTO_HMAC_BITS

[Ryan Sleevi, 2014/03/06 21:51:37]

if defined(...)

[eroman, 2014/03/06 21:54:18]

Done.

+      if (params->hasLengthBits()) {
+        if (params->optionalLengthBits() % 8)
+          return Status::ErrorGenerateKeyLength();
+        keylen_bytes = params->optionalLengthBits() / 8;
+#else
       if (params->hasLengthBytes()) {
         keylen_bytes = params->optionalLengthBytes();
+#endif
       } else {
         keylen_bytes = ShaBlockSizeBytes(params->hash().id());
         if (keylen_bytes == 0)