Support for the new WebCrypto digest by chunks API.

content/child/webcrypto/platform_crypto.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_CHILD_WEBCRYPTO_PLATFORM_CRYPTO_H_
 #define CONTENT_CHILD_WEBCRYPTO_PLATFORM_CRYPTO_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "third_party/WebKit/public/platform/WebArrayBuffer.h"
@@ skipping 73 matching lines @@
                 const blink::WebCryptoAlgorithm& hash,
                 const CryptoData& data,
                 blink::WebArrayBuffer* buffer);
 
 // Preconditions:
 //  * |algorithm| is a SHA function.
 Status DigestSha(blink::WebCryptoAlgorithmId algorithm,
                  const CryptoData& data,
                  blink::WebArrayBuffer* buffer);
 
+blink::WebCryptoDigestor* CreateDigestor(

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

* Please add a precondition comment saying that algorithm_id is for a hash.
* Can you change the signature to be so either it returns a scoped_ptr<>, or it
takes a scoped_ptr<>* as input?

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

Done.

+    blink::WebCryptoAlgorithmId algorithm_id);
+
 // Preconditions:
 //  * |key| is non-null.
 //  * |hash| is a digest algorithm.
 Status SignRsaSsaPkcs1v1_5(PrivateKey* key,
                            const blink::WebCryptoAlgorithm& hash,
                            const CryptoData& data,
                            blink::WebArrayBuffer* buffer);
 
 // Preconditions:
 //  * |key| is non-null.
@@ skipping 130 matching lines @@
                          blink::WebCryptoKeyUsageMask usage_mask,
                          blink::WebCryptoKey* key);
 
 }  // namespace platform
 
 }  // namespace webcrypto
 
 }  // namespace content
 
 #endif  // CONTENT_CHILD_WEBCRYPTO_PLATFORM_CRYPTO_H_