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 "base/memory/scoped_ptr.h"
 #include "third_party/WebKit/public/platform/WebArrayBuffer.h"
 #include "third_party/WebKit/public/platform/WebCrypto.h"
 #include "third_party/WebKit/public/platform/WebCryptoAlgorithmParams.h"
 
 namespace content {
 
 enum EncryptOrDecrypt { ENCRYPT, DECRYPT };
 
 namespace webcrypto {
 
@@ skipping 65 matching lines @@
                 const CryptoData& data,
                 blink::WebArrayBuffer* buffer);
 
 // Preconditions:
 //  * |algorithm| is a SHA function.
 Status DigestSha(blink::WebCryptoAlgorithmId algorithm,
                  const CryptoData& data,
                  blink::WebArrayBuffer* buffer);
 
 // Preconditions:
+//  * |algorithm| is a SHA function.
+scoped_ptr<blink::WebCryptoDigestor> CreateDigestor(
+    blink::WebCryptoAlgorithmId algorithm);
+
+// 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.
 //  * |hash| is a digest algorithm.
@@ skipping 129 matching lines @@
                          blink::WebCryptoKeyUsageMask usage_mask,
                          blink::WebCryptoKey* key);
 
 }  // namespace platform
 
 }  // namespace webcrypto
 
 }  // namespace content
 
 #endif  // CONTENT_CHILD_WEBCRYPTO_PLATFORM_CRYPTO_H_