Add support for GCM cipher suites from RFC 7714.

webrtc/api/peerconnectionfactory.h

Index: webrtc/api/peerconnectionfactory.h
diff --git a/webrtc/api/peerconnectionfactory.h b/webrtc/api/peerconnectionfactory.h
index 39a64027b646c2b4b2e7f31f8d66ec3113f0f7e0..8a4ae72c9256504bf97558bc34bd0ab217f14ed8 100644
--- a/webrtc/api/peerconnectionfactory.h
+++ b/webrtc/api/peerconnectionfactory.h
@@ -31,9 +31,7 @@ namespace webrtc {
 
 class PeerConnectionFactory : public PeerConnectionFactoryInterface {
  public:
-  void SetOptions(const Options& options) override {
-    options_ = options;
-  }
+  void SetOptions(const Options& options) override;
 
   // Deprecated, use version without constraints.
   rtc::scoped_refptr<PeerConnectionInterface> CreatePeerConnection(