html_viewer: Move webcrypto to a place where html_viewer can use it.

components/webcrypto/nss/aes_algorithm_nss.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_NSS_AES_ALGORITHM_NSS_H_
-#define CONTENT_CHILD_WEBCRYPTO_NSS_AES_ALGORITHM_NSS_H_
+#ifndef COMPONENTS_WEBCRYPTO_NSS_AES_ALGORITHM_NSS_H_
+#define COMPONENTS_WEBCRYPTO_NSS_AES_ALGORITHM_NSS_H_
 
 #include <pkcs11t.h>
 
-#include "content/child/webcrypto/algorithm_implementation.h"
-
-namespace content {
+#include "components/webcrypto/algorithm_implementation.h"
 
 namespace webcrypto {
 
 // Base class for AES algorithms that provides the implementation for key
 // creation and export.
 class AesAlgorithm : public AlgorithmImplementation {
  public:
   // Constructs an AES algorithm whose keys will be imported using the NSS
   // mechanism |import_mechanism|.
   // |all_key_usages| is the set of all WebCrypto key usages that are
@@ skipping 54 matching lines @@
                       unsigned int* length_bits) const override;
 
  private:
   const CK_MECHANISM_TYPE import_mechanism_;
   const blink::WebCryptoKeyUsageMask all_key_usages_;
   const std::string jwk_suffix_;
 };
 
 }  // namespace webcrypto
 
-}  // namespace content
-
-#endif  // CONTENT_CHILD_WEBCRYPTO_NSS_AES_ALGORITHM_NSS_H_
+#endif  // COMPONENTS_WEBCRYPTO_NSS_AES_ALGORITHM_NSS_H_