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

trunk/src/content/child/webcrypto/webcrypto_util.h

Index: trunk/src/content/child/webcrypto/webcrypto_util.h
===================================================================
--- trunk/src/content/child/webcrypto/webcrypto_util.h	(revision 266902)
+++ trunk/src/content/child/webcrypto/webcrypto_util.h	(working copy)
@@ -11,6 +11,7 @@
 #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"
 
@@ -24,8 +25,16 @@
 // 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.