Remove SSLPrivateKey metadata hooks.

net/ssl/ssl_platform_key_chromecast.cc

Index: net/ssl/ssl_platform_key_chromecast.cc
diff --git a/net/ssl/ssl_platform_key_chromecast.cc b/net/ssl/ssl_platform_key_chromecast.cc
index 5993a3bbe3e3727484567ee3c2ee492543c459ce..1b4d2da3c807460f2abb069fb651f1d6de968d01 100644
--- a/net/ssl/ssl_platform_key_chromecast.cc
+++ b/net/ssl/ssl_platform_key_chromecast.cc
@@ -38,20 +38,11 @@ class SSLPlatformKeyChromecast : public ThreadedSSLPrivateKey::Delegate {
       : key_(std::move(key)) {}
   ~SSLPlatformKeyChromecast() override {}
 
-  SSLPrivateKey::Type GetType() override { return SSLPrivateKey::Type::RSA; }
-
   std::vector<SSLPrivateKey::Hash> GetDigestPreferences() override {
     return std::vector<SSLPrivateKey::Hash>{SSLPrivateKey::Hash::SHA256,
                                             SSLPrivateKey::Hash::SHA1};
   }
 
-  size_t GetMaxSignatureLengthInBytes() override {
-    int len = PK11_SignatureLen(key_.get());
-    if (len <= 0)
-      return 0;
-    return static_cast<size_t>(len);
-  }
-
   Error SignDigest(SSLPrivateKey::Hash hash,
                    const base::StringPiece& input,
                    std::vector<uint8_t>* signature) override {