Add missing RTC_EXPORT for the component build.

Bug: webrtc:9419
Change-Id: I3225259fb4cc55e9820f590928795f4587f1e3cb
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/153884
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#29479}
diff --git a/api/crypto/crypto_options.h b/api/crypto/crypto_options.h
index f0b91d0..91a585a 100644
--- a/api/crypto/crypto_options.h
+++ b/api/crypto/crypto_options.h
@@ -13,12 +13,14 @@
 
 #include <vector>
 
+#include "rtc_base/system/rtc_export.h"
+
 namespace webrtc {
 
 // CryptoOptions defines advanced cryptographic settings for native WebRTC.
 // These settings must be passed into PeerConnectionFactoryInterface::Options
 // and are only applicable to native use cases of WebRTC.
-struct CryptoOptions {
+struct RTC_EXPORT CryptoOptions {
   CryptoOptions();
   CryptoOptions(const CryptoOptions& other);
   ~CryptoOptions();