[webcrypto] Make operations run on worker threads.

content/child/webcrypto/webcrypto_impl.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_IMPL_H_
 #define CONTENT_CHILD_WEBCRYPTO_WEBCRYPTO_IMPL_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "third_party/WebKit/public/platform/WebCrypto.h"
 #include "third_party/WebKit/public/platform/WebCryptoAlgorithm.h"
 #include "third_party/WebKit/public/platform/WebVector.h"
 
 namespace content {
 
-// Wrapper around the blink WebCrypto asynchronous interface, which forwards to
+// Wrapper around the Blink WebCrypto asynchronous interface, which forwards to
 // the synchronous platfrom (NSS or OpenSSL) implementation.
 //
 // TODO(eroman): Post the synchronous work to a background thread.
 class WebCryptoImpl : public blink::WebCrypto {
  public:
   WebCryptoImpl();
   virtual ~WebCryptoImpl();
 
   virtual void encrypt(const blink::WebCryptoAlgorithm& algorithm,
                        const blink::WebCryptoKey& key,
@@ skipping 43 matching lines @@
   virtual void unwrapKey(
       blink::WebCryptoKeyFormat format,
       const unsigned char* wrapped_key,
       unsigned wrapped_key_size,
       const blink::WebCryptoKey& wrapping_key,
       const blink::WebCryptoAlgorithm& unwrap_algorithm,
       const blink::WebCryptoAlgorithm& unwrapped_key_algorithm,
       bool extractable,
       blink::WebCryptoKeyUsageMask usages,
       blink::WebCryptoResult result);
-  // This method synchronously computes a digest for the given data, returning
-  // |true| if successful and |false| otherwise.
-  virtual bool digestSynchronous(const blink::WebCryptoAlgorithmId algorithm_id,
-                                 const unsigned char* data,
-                                 unsigned int data_size,
-                                 blink::WebArrayBuffer& result);
+
   // This method returns a digestor object that can be used to synchronously
   // compute a digest one chunk at a time. Thus, the consume does not need to
   // hold onto a large buffer with all the data to digest. Chunks can be given
   // one at a time and the digest will be computed piecemeal. The allocated
   // WebCrytpoDigestor that is returned by createDigestor must be freed by the
   // caller.
   virtual blink::WebCryptoDigestor* createDigestor(
       blink::WebCryptoAlgorithmId algorithm_id);
 
   virtual bool deserializeKeyForClone(
       const blink::WebCryptoKeyAlgorithm& algorithm,
       blink::WebCryptoKeyType type,
       bool extractable,
       blink::WebCryptoKeyUsageMask usages,
       const unsigned char* key_data,
       unsigned key_data_size,
       blink::WebCryptoKey& key);
 
   virtual bool serializeKeyForClone(const blink::WebCryptoKey& key,
                                     blink::WebVector<unsigned char>& key_data);
 
  private:
   DISALLOW_COPY_AND_ASSIGN(WebCryptoImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_CHILD_WEBCRYPTO_WEBCRYPTO_IMPL_H_