Support for the new WebCrypto digest by chunks API.

content/child/webcrypto/shared_crypto.cc

Index: content/child/webcrypto/shared_crypto.cc
diff --git a/content/child/webcrypto/shared_crypto.cc b/content/child/webcrypto/shared_crypto.cc
index af2beaca2a672fbbca28886ed65115dfb49e5112..0e67a6e9bd750a71d1e6ab42614f65ceae9501ce 100644
--- a/content/child/webcrypto/shared_crypto.cc
+++ b/content/child/webcrypto/shared_crypto.cc
@@ -519,6 +519,18 @@ Status Digest(const blink::WebCryptoAlgorithm& algorithm,
   }
 }
 
+blink::WebCryptoDigestor* CreateDigestor(blink::WebCryptoAlgorithm algorithm) {
+  switch (algorithm.id()) {
+    case blink::WebCryptoAlgorithmIdSha1:
+    case blink::WebCryptoAlgorithmIdSha256:
+    case blink::WebCryptoAlgorithmIdSha384:
+    case blink::WebCryptoAlgorithmIdSha512:
+      return platform::CreateDigestor(algorithm.id());
+    default:
+      return 0;

[eroman, 2014/03/25 23:26:23]

return NULL in chromium land

[jww, 2014/03/26 00:42:31]

Done.

+  }
+}
+
 Status GenerateSecretKey(const blink::WebCryptoAlgorithm& algorithm,
                          bool extractable,
                          blink::WebCryptoKeyUsageMask usage_mask,