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

components/webcrypto/crypto_data.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_CRYPTO_DATA_H_
-#define CONTENT_CHILD_WEBCRYPTO_CRYPTO_DATA_H_
+#ifndef COMPONENTS_WEBCRYPTO_CRYPTO_DATA_H_
+#define COMPONENTS_WEBCRYPTO_CRYPTO_DATA_H_
 
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
-#include "content/common/content_export.h"
 #include "third_party/WebKit/public/platform/WebVector.h"
 
-namespace content {
-
 namespace webcrypto {
 
 // Helper to pass around a range of immutable bytes. This is conceptually
 // similar to base::StringPiece, but for crypto byte data.
 //
 // The data used at construction is NOT owned, and should remain valid as long
 // as the CryptoData is being used.
-class CONTENT_EXPORT CryptoData {
+class CryptoData {
  public:
   // Constructs empty data.
   CryptoData();
 
   CryptoData(const unsigned char* bytes, unsigned int byte_length);
 
   // These constructors do NOT copy the data. Hence the base pointer should
   // remain valid for the lifetime of CryptoData.
   explicit CryptoData(const std::vector<unsigned char>& bytes);
   explicit CryptoData(const std::string& bytes);
   explicit CryptoData(const blink::WebVector<unsigned char>& bytes);
 
   const unsigned char* bytes() const { return bytes_; }
   unsigned int byte_length() const { return byte_length_; }
 
  private:
   const unsigned char* const bytes_;
   const unsigned int byte_length_;
 };
 
 }  // namespace webcrypto
 
-}  // namespace content
-
-#endif  // CONTENT_CHILD_WEBCRYPTO_CRYPTO_DATA_H_
+#endif  // COMPONENTS_WEBCRYPTO_CRYPTO_DATA_H_