[webcrypto] Add RSA public key SPKI import/export for NSS.

content/renderer/webcrypto/webcrypto_impl.h

 // Copyright (c) 2013 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_RENDERER_WEBCRYPTO_WEBCRYPTO_IMPL_H_
 #define CONTENT_RENDERER_WEBCRYPTO_WEBCRYPTO_IMPL_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "content/common/content_export.h"
@@ skipping 29 matching lines @@
       blink::WebCryptoKeyUsageMask usage_mask,
       blink::WebCryptoResult result);
   virtual void importKey(
       blink::WebCryptoKeyFormat format,
       const unsigned char* key_data,
       unsigned key_data_size,
       const blink::WebCryptoAlgorithm& algorithm_or_null,
       bool extractable,
       blink::WebCryptoKeyUsageMask usage_mask,
       blink::WebCryptoResult result);
+  virtual void exportKey(
+      blink::WebCryptoKeyFormat format,
+      const blink::WebCryptoKey& key,
+      blink::WebCryptoResult result);
   virtual void sign(
       const blink::WebCryptoAlgorithm& algorithm,
       const blink::WebCryptoKey& key,
       const unsigned char* data,
       unsigned data_size,
       blink::WebCryptoResult result);
   virtual void verifySignature(
       const blink::WebCryptoAlgorithm& algorithm,
       const blink::WebCryptoKey& key,
       const unsigned char* signature,
@@ skipping 38 matching lines @@
       blink::WebCryptoKey* public_key,
       blink::WebCryptoKey* private_key);
   bool ImportKeyInternal(
       blink::WebCryptoKeyFormat format,
       const unsigned char* key_data,
       unsigned key_data_size,
       const blink::WebCryptoAlgorithm& algorithm_or_null,
       bool extractable,
       blink::WebCryptoKeyUsageMask usage_mask,
       blink::WebCryptoKey* key);
+  bool ExportKeyInternal(
+      blink::WebCryptoKeyFormat format,
+      const blink::WebCryptoKey& key,
+      blink::WebArrayBuffer* buffer);
   bool SignInternal(
       const blink::WebCryptoAlgorithm& algorithm,
       const blink::WebCryptoKey& key,
       const unsigned char* data,
       unsigned data_size,
       blink::WebArrayBuffer* buffer);
   bool VerifySignatureInternal(
       const blink::WebCryptoAlgorithm& algorithm,
       const blink::WebCryptoKey& key,
       const unsigned char* signature,
       unsigned signature_size,
       const unsigned char* data,
       unsigned data_size,
       bool* signature_match);
 
  private:
   DISALLOW_COPY_AND_ASSIGN(WebCryptoImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_WEBCRYPTO_WEBCRYPTO_IMPL_H_