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

components/webcrypto/algorithm_implementation.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_ALGORITHM_IMPLEMENTATION_H_
-#define CONTENT_CHILD_WEBCRYPTO_ALGORITHM_IMPLEMENTATION_H_
+#ifndef COMPONENTS_WEBCRYPTO_ALGORITHM_IMPLEMENTATION_H_
+#define COMPONENTS_WEBCRYPTO_ALGORITHM_IMPLEMENTATION_H_
 
 #include <stdint.h>
 #include <vector>
 
 #include "base/memory/scoped_ptr.h"
 #include "third_party/WebKit/public/platform/WebCrypto.h"
 
-namespace content {
-
 namespace webcrypto {
 
 class CryptoData;
 class GenerateKeyResult;
 class Status;
 
 // AlgorithmImplementation is a base class for *executing* the operations of an
 // algorithm (generating keys, encrypting, signing, etc.).
 //
 // This is in contrast to blink::WebCryptoAlgorithm which instead *describes*
@@ skipping 188 matching lines @@
       const blink::WebCryptoKeyAlgorithm& algorithm,
       blink::WebCryptoKeyType type,
       bool extractable,
       blink::WebCryptoKeyUsageMask usages,
       const CryptoData& key_data,
       blink::WebCryptoKey* key) const;
 };
 
 }  // namespace webcrypto
 
-}  // namespace content
-
-#endif  // CONTENT_CHILD_WEBCRYPTO_ALGORITHM_IMPLEMENTATION_H_
+#endif  // COMPONENTS_WEBCRYPTO_ALGORITHM_IMPLEMENTATION_H_