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

components/webcrypto/jwk.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_JWK_H_
 #define CONTENT_CHILD_WEBCRYPTO_JWK_H_
 
 #include <stdint.h>
 #include <vector>
 
 #include "base/strings/string_piece.h"
 #include "base/values.h"
-#include "content/common/content_export.h"
 #include "third_party/WebKit/public/platform/WebCrypto.h"
 
-namespace content {
+namespace components {
 
 namespace webcrypto {
 
 class CryptoData;
 class Status;
 
 // Helper class for parsing a JWK from JSON.
 //
 // This primarily exists to ensure strict enforcement of the JWK schema, as the
 // type and presence of particular members is security relevant. For example,
@@ skipping 199 matching lines @@
                      bool expected_extractable,
                      blink::WebCryptoKeyUsageMask expected_usages,
                      JwkRsaInfo* result);
 
 const char* GetJwkHmacAlgorithmName(blink::WebCryptoAlgorithmId hash);
 
 // This decodes JWK's flavor of base64 encoding, as described by:
 // https://tools.ietf.org/html/draft-ietf-jose-json-web-signature-36#section-2
 //
 // In essence it is RFC 4648 'base64url' encoding where padding is omitted.
-CONTENT_EXPORT bool Base64DecodeUrlSafe(const std::string& input,
-                                        std::string* output);
+bool Base64DecodeUrlSafe(const std::string& input, std::string* output);
 
 // Encodes |input| using JWK's flavor of base64 encoding. See the description
 // above for details.
-CONTENT_EXPORT std::string Base64EncodeUrlSafe(const base::StringPiece& input);
-CONTENT_EXPORT std::string Base64EncodeUrlSafe(
-    const std::vector<uint8_t>& input);
+std::string Base64EncodeUrlSafe(const base::StringPiece& input);
+std::string Base64EncodeUrlSafe(const std::vector<uint8_t>& input);
 
 // Converts a JWK "key_ops" array to the corresponding WebCrypto usages. Used by
 // testing.
-CONTENT_EXPORT Status
-GetWebCryptoUsagesFromJwkKeyOpsForTest(const base::ListValue* key_ops,
-                                       blink::WebCryptoKeyUsageMask* usages);
+Status GetWebCryptoUsagesFromJwkKeyOpsForTest(
+    const base::ListValue* key_ops,
+    blink::WebCryptoKeyUsageMask* usages);
 
 }  // namespace webcrypto
 
-}  // namespace content
+}  // namespace components
 
 #endif  // CONTENT_CHILD_WEBCRYPTO_JWK_H_