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

components/webcrypto/nss/sym_key_nss.h

Index: components/webcrypto/nss/sym_key_nss.h
diff --git a/content/child/webcrypto/nss/sym_key_nss.h b/components/webcrypto/nss/sym_key_nss.h
similarity index 83%
rename from content/child/webcrypto/nss/sym_key_nss.h
rename to components/webcrypto/nss/sym_key_nss.h
index cad997420be4ca8f2d642063b4b06733b1744f81..78d0acb9be17b9fdb12120d3f7573d616c86eed4 100644
--- a/content/child/webcrypto/nss/sym_key_nss.h
+++ b/components/webcrypto/nss/sym_key_nss.h
@@ -2,15 +2,13 @@
 // 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_SYM_KEY_NSS_H_
-#define CONTENT_CHILD_WEBCRYPTO_NSS_SYM_KEY_NSS_H_
+#ifndef COMPONENTS_WEBCRYPTO_NSS_SYM_KEY_NSS_H_
+#define COMPONENTS_WEBCRYPTO_NSS_SYM_KEY_NSS_H_
 
 #include <pkcs11t.h>
 
 #include "third_party/WebKit/public/platform/WebCrypto.h"
 
-namespace content {
-
 namespace webcrypto {
 
 class CryptoData;
@@ -33,6 +31,4 @@ Status ImportKeyRawNss(const CryptoData& key_data,
 
 }  // namespace webcrypto
 
-}  // namespace content
-
-#endif  // CONTENT_CHILD_WEBCRYPTO_NSS_SYM_KEY_NSS_H_
+#endif  // COMPONENTS_WEBCRYPTO_NSS_SYM_KEY_NSS_H_