[Android] Fix remaining linker errors for components build

net/android/keystore.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 NET_ANDROID_KEYSTORE_H
 #define NET_ANDROID_KEYSTORE_H
 
 #include <jni.h>
 
 #include <string>
@@ skipping 63 matching lines @@
 
 // Compute the signature of a given message, which is actually a hash,
 // using a private key. For more details, please read the comments for the
 // rawSignDigestWithPrivateKey method in AndroidKeyStore.java.
 //
 // |private_key| is a JNI reference for the private key.
 // |digest| is the input digest.
 // |signature| will receive the signature on success.
 // Returns true on success, false on failure.
 //
-bool RawSignDigestWithPrivateKey(
+NET_EXPORT bool RawSignDigestWithPrivateKey(
     jobject private_key,
     const base::StringPiece& digest,
     std::vector<uint8>* signature);
 
 
 // Return the PrivateKeyType of a given private key.
 // |private_key| is a JNI reference for the private key.
 // Returns a PrivateKeyType, while will be CLIENT_CERT_INVALID_TYPE
 // on error.
 NET_EXPORT PrivateKeyType GetPrivateKeyType(jobject private_key);
@@ skipping 13 matching lines @@
 //       the returned key's reference count.
 EVP_PKEY* GetOpenSSLSystemHandleForPrivateKey(jobject private_key);
 
 // Register JNI methods
 NET_EXPORT bool RegisterKeyStore(JNIEnv* env);
 
 }  // namespace android
 }  // namespace net
 
 #endif  // NET_ANDROID_KEYSTORE_H