Update native plugin dll for turn servers and video.

This CL was modified from work of sharifferdous@ (intern supervised by lliuu@)

BUG=webrtc:7389

Review-Url: https://codereview.webrtc.org/2987723002
Cr-Commit-Position: refs/heads/master@{#19146}
diff --git a/webrtc/examples/unityplugin/unity_plugin_apis.h b/webrtc/examples/unityplugin/unity_plugin_apis.h
index bcd1af3..ee7d709 100644
--- a/webrtc/examples/unityplugin/unity_plugin_apis.h
+++ b/webrtc/examples/unityplugin/unity_plugin_apis.h
@@ -15,16 +15,22 @@
 
 #include <stdint.h>
 
-// Defintions of callback functions.
-typedef void (*VIDEOFRAMEREADY_CALLBACK)(uint8_t* buffer,
-                                         uint32_t width,
-                                         uint32_t height,
-                                         uint32_t stride);
+// Definitions of callback functions.
+typedef void (*I420FRAMEREADY_CALLBACK)(const uint8_t* data_y,
+                                        const uint8_t* data_u,
+                                        const uint8_t* data_v,
+                                        int stride_y,
+                                        int stride_u,
+                                        int stride_v,
+                                        uint32_t width,
+                                        uint32_t height);
 typedef void (*LOCALDATACHANNELREADY_CALLBACK)();
 typedef void (*DATAFROMEDATECHANNELREADY_CALLBACK)(const char* msg);
 typedef void (*FAILURE_CALLBACK)(const char* msg);
-typedef void (*LOCALSDPREADYTOSEND_CALLBACK)(const char* msg);
-typedef void (*ICECANDIDATEREADYTOSEND_CALLBACK)(const char* msg);
+typedef void (*LOCALSDPREADYTOSEND_CALLBACK)(const char* type, const char* sdp);
+typedef void (*ICECANDIDATEREADYTOSEND_CALLBACK)(const char* candidate,
+                                                 const int sdp_mline_index,
+                                                 const char* sdp_mid);
 typedef void (*AUDIOBUSREADY_CALLBACK)(const void* audio_data,
                                        int bits_per_sample,
                                        int sample_rate,
@@ -34,7 +40,10 @@
 #define WEBRTC_PLUGIN_API __declspec(dllexport)
 extern "C" {
 // Create a peerconnection and return a unique peer connection id.
-WEBRTC_PLUGIN_API int CreatePeerConnection();
+WEBRTC_PLUGIN_API int CreatePeerConnection(const char** turn_urls,
+                                           const int no_of_urls,
+                                           const char* username,
+                                           const char* credential);
 // Close a peerconnection.
 WEBRTC_PLUGIN_API bool ClosePeerConnection(int peer_connection_id);
 // Add a audio stream. If audio_only is true, the stream only has an audio
@@ -54,11 +63,23 @@
 WEBRTC_PLUGIN_API bool SetAudioControl(int peer_connection_id,
                                        bool is_mute,
                                        bool is_record);
+// Set remote sdp.
+WEBRTC_PLUGIN_API bool SetRemoteDescription(int peer_connection_id,
+                                            const char* type,
+                                            const char* sdp);
+// Add ice candidate.
+WEBRTC_PLUGIN_API bool AddIceCandidate(const int peer_connection_id,
+                                       const char* candidate,
+                                       const int sdp_mlineindex,
+                                       const char* sdp_mid);
 
 // Register callback functions.
-WEBRTC_PLUGIN_API bool RegisterOnVideoFramReady(
+WEBRTC_PLUGIN_API bool RegisterOnLocalI420FrameReady(
     int peer_connection_id,
-    VIDEOFRAMEREADY_CALLBACK callback);
+    I420FRAMEREADY_CALLBACK callback);
+WEBRTC_PLUGIN_API bool RegisterOnRemoteI420FrameReady(
+    int peer_connection_id,
+    I420FRAMEREADY_CALLBACK callback);
 WEBRTC_PLUGIN_API bool RegisterOnLocalDataChannelReady(
     int peer_connection_id,
     LOCALDATACHANNELREADY_CALLBACK callback);
@@ -75,9 +96,6 @@
 WEBRTC_PLUGIN_API bool RegisterOnIceCandiateReadytoSend(
     int peer_connection_id,
     ICECANDIDATEREADYTOSEND_CALLBACK callback);
-WEBRTC_PLUGIN_API int ReceivedSdp(int peer_connection_id, const char* sdp);
-WEBRTC_PLUGIN_API bool ReceivedIceCandidate(int peer_connection_id,
-                                            const char* ice_candidate);
 }
 
 #endif  // WEBRTC_EXAMPLES_UNITYPLUGIN_UNITY_PLUGIN_APIS_H_