Revert 266798 "[webcrypto] Make operations run on a background t..."

trunk/src/content/child/webcrypto/webcrypto_util.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_WEBCRYPTO_UTIL_H_
 #define CONTENT_CHILD_WEBCRYPTO_WEBCRYPTO_UTIL_H_
 
 #include <string>
 #include <vector>
 #include "base/basictypes.h"
 #include "base/strings/string_piece.h"
 #include "base/values.h"
 #include "content/common/content_export.h"
+#include "third_party/WebKit/public/platform/WebArrayBuffer.h"
 #include "third_party/WebKit/public/platform/WebCryptoAlgorithm.h"
 #include "third_party/WebKit/public/platform/WebCryptoKey.h"
 
 namespace content {
 
 namespace webcrypto {
 
 class Status;
 
 // Returns a pointer to the start of |data|, or NULL if it is empty. This is a
 // convenience function for getting the pointer, and should not be used beyond
 // the expected lifetime of |data|.
 CONTENT_EXPORT const uint8* Uint8VectorStart(const std::vector<uint8>& data);
-CONTENT_EXPORT uint8* Uint8VectorStart(std::vector<uint8>* data);
+
+// Shrinks a WebArrayBuffer to a new size.
+// TODO(eroman): This works by re-allocating a new buffer. It would be better if
+//               the WebArrayBuffer could just be truncated instead.
+void ShrinkBuffer(blink::WebArrayBuffer* buffer, unsigned int new_size);
+
+// Creates a WebArrayBuffer from a uint8 byte array
+blink::WebArrayBuffer CreateArrayBuffer(const uint8* data,
+                                        unsigned int data_size);
 
 // This function decodes unpadded 'base64url' encoded data, as described in
 // RFC4648 (http://www.ietf.org/rfc/rfc4648.txt) Section 5.
 // In Web Crypto, this type of encoding is only used inside JWK.
 CONTENT_EXPORT bool Base64DecodeUrlSafe(const std::string& input,
                                         std::string* output);
 
 // Returns an unpadded 'base64url' encoding of the input data, the opposite of
 // Base64DecodeUrlSafe() above.
 std::string Base64EncodeUrlSafe(const base::StringPiece& input);
@@ skipping 33 matching lines @@
 
 bool CreateSecretKeyAlgorithm(const blink::WebCryptoAlgorithm& algorithm,
                               unsigned int keylen_bytes,
                               blink::WebCryptoKeyAlgorithm* key_algorithm);
 
 }  // namespace webcrypto
 
 }  // namespace content
 
 #endif  // CONTENT_CHILD_WEBCRYPTO_WEBCRYPTO_UTIL_H_