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

components/webcrypto/nss/key_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_KEY_NSS_H_
-#define CONTENT_CHILD_WEBCRYPTO_NSS_KEY_NSS_H_
+#ifndef COMPONENTS_WEBCRYPTO_NSS_KEY_NSS_H_
+#define COMPONENTS_WEBCRYPTO_NSS_KEY_NSS_H_
 
 #include <stdint.h>
 #include <vector>
 
 #include "crypto/scoped_nss_types.h"
 #include "third_party/WebKit/public/platform/WebCryptoKey.h"
 
-namespace content {
-
 namespace webcrypto {
 
 class CryptoData;
 class PrivateKeyNss;
 class PublicKeyNss;
 class SymKeyNss;
 
 // Base key class for all NSS keys, used to safely cast between types. Each key
 // maintains a copy of its serialized form in either 'raw', 'pkcs8', or 'spki'
 // format. This is to allow structured cloning of keys synchronously from the
@@ skipping 71 matching lines @@
   }
 
  private:
   crypto::ScopedSECKEYPrivateKey key_;
 
   DISALLOW_COPY_AND_ASSIGN(PrivateKeyNss);
 };
 
 }  // namespace webcrypto
 
-}  // namespace content
-
-#endif  // CONTENT_CHILD_WEBCRYPTO_NSS_KEY_NSS_H_
+#endif  // COMPONENTS_WEBCRYPTO_NSS_KEY_NSS_H_