Revert "Add SSLConfig object to IceServer."

This reverts commit 7f1ffcccce563a086da037334aec2d4faa723edb.

Reason for revert: Speculative revert

Original change's description:
> Add SSLConfig object to IceServer.
> 
> This is being added to allow greater configurability to TLS connections.
> tlsAlpnProtocols, tlsEllipticCurves and tlsCertPolicy will be removed from IceServer in a
> follow-up CL.
> 
> Bug: webrtc:9662
> Change-Id: I33cb804b02c26c662ed2a28c76f9a9dc2df40f36
> Reviewed-on: https://webrtc-review.googlesource.com/96020
> Commit-Queue: Diogo Real <diogor@google.com>
> Reviewed-by: Qingsi Wang <qingsi@webrtc.org>
> Reviewed-by: Benjamin Wright <benwright@webrtc.org>
> Reviewed-by: Steve Anton <steveanton@webrtc.org>
> Reviewed-by: Sami Kalliomäki <sakal@webrtc.org>
> Reviewed-by: Kári Helgason <kthelgason@webrtc.org>
> Cr-Commit-Position: refs/heads/master@{#24559}

TBR=steveanton@webrtc.org,sakal@webrtc.org,kthelgason@webrtc.org,juberti@webrtc.org,emadomara@webrtc.org,qingsi@webrtc.org,benwright@webrtc.org,diogor@google.com

Change-Id: Iae9fc68b77f743876bda36fc2a04f6d791aae8e2
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: webrtc:9662
Reviewed-on: https://webrtc-review.googlesource.com/98000
Reviewed-by: Ying Wang <yinwa@webrtc.org>
Commit-Queue: Ying Wang <yinwa@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#24563}
diff --git a/sdk/android/api/org/webrtc/PeerConnection.java b/sdk/android/api/org/webrtc/PeerConnection.java
index d2a61e0..2f9adcf 100644
--- a/sdk/android/api/org/webrtc/PeerConnection.java
+++ b/sdk/android/api/org/webrtc/PeerConnection.java
@@ -71,180 +71,6 @@
     }
   }
 
-  /**
-   * Java version of PeerConnectionInterface::SSLConfig.
-   *
-   * Contains the configuration of any SSL/TLS connections that are initiated by
-   * our client.
-   */
-  public static class SslConfig {
-    /** Indicates whether to enable OCSP stapling in TLS. */
-    public final boolean enableOcspStapling;
-    /** Indicates whether to enable the signed certificate timestamp extension in TLS. */
-    public final boolean enableSignedCertTimestamp;
-    /** Indicates whether to enable the TLS Channel ID extension. */
-    public final boolean enableTlsChannelId;
-    /** Indicates whether to enable the TLS GREASE extension. */
-    public final boolean enableGrease;
-
-    /** Indicates how to process TURN server certificates */
-    public final TlsCertPolicy tlsCertPolicy;
-
-    /**
-     * Highest supported SSL version, as defined in the supported_versions TLS extension.
-     * If null, the default OpenSSL/BoringSSL max version will be used.
-     */
-    @Nullable public final Integer maxSslVersion;
-
-    /**
-     * List of protocols to be used in the TLS ALPN extension.
-     * If null, the default list of OpenSSL/BoringSSL ALPN protocols will be used.
-     */
-    @Nullable public final List<String> tlsAlpnProtocols;
-
-    /**
-     * List of elliptic curves to be used in the TLS elliptic curves extension.
-     * Only curve names supported by OpenSSL should be used (eg. "P-256","X25519").
-     * If null, the default list of OpenSSL/BoringSSL curves will be used.
-     */
-    @Nullable public final List<String> tlsEllipticCurves;
-
-    private SslConfig(boolean enableOcspStapling, boolean enableSignedCertTimestamp,
-        boolean enableTlsChannelId, boolean enableGrease, TlsCertPolicy tlsCertPolicy,
-        Integer maxSslVersion, List<String> tlsAlpnProtocols, List<String> tlsEllipticCurves) {
-      this.enableOcspStapling = enableOcspStapling;
-      this.enableSignedCertTimestamp = enableSignedCertTimestamp;
-      this.enableTlsChannelId = enableTlsChannelId;
-      this.enableGrease = enableGrease;
-      this.tlsCertPolicy = tlsCertPolicy;
-      this.maxSslVersion = maxSslVersion;
-      if (tlsAlpnProtocols != null) {
-        this.tlsAlpnProtocols = Collections.unmodifiableList(tlsAlpnProtocols);
-      } else {
-        this.tlsAlpnProtocols = null;
-      }
-      if (tlsEllipticCurves != null) {
-        this.tlsEllipticCurves = Collections.unmodifiableList(tlsEllipticCurves);
-      } else {
-        this.tlsEllipticCurves = null;
-      }
-    }
-
-    @Override
-    public String toString() {
-      return "[enableOcspStapling=" + enableOcspStapling + "] [enableSignedCertTimestamp="
-          + enableSignedCertTimestamp + "] [enableTlsChannelId=" + enableTlsChannelId
-          + "] [enableGrease=" + enableGrease + "] [tlsCertPolicy=" + tlsCertPolicy
-          + "] [maxSslVersion=" + maxSslVersion + "] [tlsAlpnProtocols=" + tlsAlpnProtocols
-          + "] [tlsEllipticCurves=" + tlsEllipticCurves + "]";
-    }
-
-    public static Builder builder() {
-      return new Builder();
-    }
-
-    public static class Builder {
-      private boolean enableOcspStapling = true;
-      private boolean enableSignedCertTimestamp = true;
-      private boolean enableTlsChannelId = false;
-      private boolean enableGrease = false;
-      private TlsCertPolicy tlsCertPolicy = TlsCertPolicy.TLS_CERT_POLICY_SECURE;
-      @Nullable private Integer maxSslVersion = null;
-      @Nullable private List<String> tlsAlpnProtocols = null;
-      @Nullable private List<String> tlsEllipticCurves = null;
-
-      private Builder() {}
-
-      public Builder setEnableOcspStapling(boolean enableOcspStapling) {
-        this.enableOcspStapling = enableOcspStapling;
-        return this;
-      }
-
-      public Builder setEnableSignedCertTimestamp(boolean enableSignedCertTimestamp) {
-        this.enableSignedCertTimestamp = enableSignedCertTimestamp;
-        return this;
-      }
-
-      public Builder setEnableTlsChannelId(boolean enableTlsChannelId) {
-        this.enableTlsChannelId = enableTlsChannelId;
-        return this;
-      }
-
-      public Builder setEnableGrease(boolean enableGrease) {
-        this.enableGrease = enableGrease;
-        return this;
-      }
-
-      public Builder setTlsCertPolicy(TlsCertPolicy tlsCertPolicy) {
-        this.tlsCertPolicy = tlsCertPolicy;
-        return this;
-      }
-
-      public Builder setMaxSslVersion(int maxSslVersion) {
-        this.maxSslVersion = maxSslVersion;
-        return this;
-      }
-
-      public Builder setTlsAlpnProtocols(List<String> tlsAlpnProtocols) {
-        this.tlsAlpnProtocols = tlsAlpnProtocols;
-        return this;
-      }
-
-      public Builder setTlsEllipticCurves(List<String> tlsEllipticCurves) {
-        this.tlsEllipticCurves = tlsEllipticCurves;
-        return this;
-      }
-
-      public SslConfig createSslConfig() {
-        return new SslConfig(enableOcspStapling, enableSignedCertTimestamp, enableTlsChannelId,
-            enableGrease, tlsCertPolicy, maxSslVersion, tlsAlpnProtocols, tlsEllipticCurves);
-      }
-    }
-
-    @CalledByNative("SslConfig")
-    boolean getEnableOcspStapling() {
-      return enableOcspStapling;
-    }
-
-    @CalledByNative("SslConfig")
-    boolean getEnableSignedCertTimestamp() {
-      return enableSignedCertTimestamp;
-    }
-
-    @CalledByNative("SslConfig")
-    boolean getEnableTlsChannelId() {
-      return enableTlsChannelId;
-    }
-
-    @CalledByNative("SslConfig")
-    boolean getEnableGrease() {
-      return enableGrease;
-    }
-
-    @CalledByNative("SslConfig")
-    TlsCertPolicy getTlsCertPolicy() {
-      return tlsCertPolicy;
-    }
-
-    @Nullable
-    @CalledByNative("SslConfig")
-    Integer getMaxSslVersion() {
-      return maxSslVersion;
-    }
-
-    @Nullable
-    @CalledByNative("SslConfig")
-    List<String> getTlsAlpnProtocols() {
-      return tlsAlpnProtocols;
-    }
-
-    @Nullable
-    @CalledByNative("SslConfig")
-    List<String> getTlsEllipticCurves() {
-      return tlsEllipticCurves;
-    }
-  }
-
   /** Java version of PeerConnectionObserver. */
   public static interface Observer {
     /** Triggered when the SignalingState changes. */
@@ -300,9 +126,7 @@
     public final List<String> urls;
     public final String username;
     public final String password;
-    // TODO(diogor, webrtc:9673): Remove tlsCertPolicy from this API.
-    // This field will be ignored if tlsCertPolicy is also set in SslConfig.
-    @Deprecated public final TlsCertPolicy tlsCertPolicy;
+    public final TlsCertPolicy tlsCertPolicy;
 
     // If the URIs in |urls| only contain IP addresses, this field can be used
     // to indicate the hostname, which may be necessary for TLS (using the SNI
@@ -310,18 +134,12 @@
     // necessary.
     public final String hostname;
 
-    // TODO(diogor, webrtc:9673): Remove tlsAlpnProtocols from this API.
     // List of protocols to be used in the TLS ALPN extension.
-    @Deprecated public final List<String> tlsAlpnProtocols;
+    public final List<String> tlsAlpnProtocols;
 
-    // TODO(diogor, webrtc:9673): Remove tlsEllipticCurves from this API.
     // List of elliptic curves to be used in the TLS elliptic curves extension.
     // Only curve names supported by OpenSSL should be used (eg. "P-256","X25519").
-    // This field will be ignored if tlsEllipticCurves is also set in SslConfig.
-    @Deprecated public final List<String> tlsEllipticCurves;
-
-    // SSL configuration options for any SSL/TLS connections to this IceServer.
-    public final SslConfig sslConfig;
+    public final List<String> tlsEllipticCurves;
 
     /** Convenience constructor for STUN servers. */
     @Deprecated
@@ -343,12 +161,12 @@
     public IceServer(String uri, String username, String password, TlsCertPolicy tlsCertPolicy,
         String hostname) {
       this(uri, Collections.singletonList(uri), username, password, tlsCertPolicy, hostname, null,
-          null, SslConfig.builder().createSslConfig());
+          null);
     }
 
     private IceServer(String uri, List<String> urls, String username, String password,
         TlsCertPolicy tlsCertPolicy, String hostname, List<String> tlsAlpnProtocols,
-        List<String> tlsEllipticCurves, SslConfig sslConfig) {
+        List<String> tlsEllipticCurves) {
       if (uri == null || urls == null || urls.isEmpty()) {
         throw new IllegalArgumentException("uri == null || urls == null || urls.isEmpty()");
       }
@@ -374,13 +192,12 @@
       this.hostname = hostname;
       this.tlsAlpnProtocols = tlsAlpnProtocols;
       this.tlsEllipticCurves = tlsEllipticCurves;
-      this.sslConfig = sslConfig;
     }
 
     @Override
     public String toString() {
       return urls + " [" + username + ":" + password + "] [" + tlsCertPolicy + "] [" + hostname
-          + "] [" + tlsAlpnProtocols + "] [" + tlsEllipticCurves + "] [" + sslConfig + "]";
+          + "] [" + tlsAlpnProtocols + "] [" + tlsEllipticCurves + "]";
     }
 
     public static Builder builder(String uri) {
@@ -399,7 +216,6 @@
       private String hostname = "";
       private List<String> tlsAlpnProtocols;
       private List<String> tlsEllipticCurves;
-      private SslConfig sslConfig = SslConfig.builder().createSslConfig();
 
       private Builder(List<String> urls) {
         if (urls == null || urls.isEmpty()) {
@@ -418,7 +234,6 @@
         return this;
       }
 
-      @Deprecated
       public Builder setTlsCertPolicy(TlsCertPolicy tlsCertPolicy) {
         this.tlsCertPolicy = tlsCertPolicy;
         return this;
@@ -429,26 +244,19 @@
         return this;
       }
 
-      @Deprecated
       public Builder setTlsAlpnProtocols(List<String> tlsAlpnProtocols) {
         this.tlsAlpnProtocols = tlsAlpnProtocols;
         return this;
       }
 
-      @Deprecated
       public Builder setTlsEllipticCurves(List<String> tlsEllipticCurves) {
         this.tlsEllipticCurves = tlsEllipticCurves;
         return this;
       }
 
-      public Builder setSslConfig(SslConfig sslConfig) {
-        this.sslConfig = sslConfig;
-        return this;
-      }
-
       public IceServer createIceServer() {
         return new IceServer(urls.get(0), urls, username, password, tlsCertPolicy, hostname,
-            tlsAlpnProtocols, tlsEllipticCurves, sslConfig);
+            tlsAlpnProtocols, tlsEllipticCurves);
       }
     }
 
@@ -490,11 +298,6 @@
     List<String> getTlsEllipticCurves() {
       return tlsEllipticCurves;
     }
-
-    @CalledByNative("IceServer")
-    SslConfig getSslConfig() {
-      return sslConfig;
-    }
   }
 
   /** Java version of PeerConnectionInterface.IceTransportsType */