Remove top-level const from parameters in function declarations.

This is a safe cleanup change since top-level const applied to
parameters in function declarations (that are not also
definitions) are ignored by the compiler. Hence, such changes do
not change the type of the declared functions and are simply
no-ops.

Bug: webrtc:13610
Change-Id: Ibafb92c45119a6d8bdb6f9109aa8dad6385163a9
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/249086
Reviewed-by: Niels Moller <nisse@webrtc.org>
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Commit-Queue: Ali Tofigh <alito@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#35802}
diff --git a/examples/unityplugin/unity_plugin_apis.h b/examples/unityplugin/unity_plugin_apis.h
index b32f9e2..8b8fe0f 100644
--- a/examples/unityplugin/unity_plugin_apis.h
+++ b/examples/unityplugin/unity_plugin_apis.h
@@ -31,7 +31,7 @@
 typedef void (*FAILURE_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,
+                                                 int sdp_mline_index,
                                                  const char* sdp_mid);
 typedef void (*AUDIOBUSREADY_CALLBACK)(const void* audio_data,
                                        int bits_per_sample,
@@ -47,7 +47,7 @@
 extern "C" {
 // Create a peerconnection and return a unique peer connection id.
 WEBRTC_PLUGIN_API int CreatePeerConnection(const char** turn_urls,
-                                           const int no_of_urls,
+                                           int no_of_urls,
                                            const char* username,
                                            const char* credential,
                                            bool mandatory_receive_video);
@@ -75,9 +75,9 @@
                                             const char* type,
                                             const char* sdp);
 // Add ice candidate.
-WEBRTC_PLUGIN_API bool AddIceCandidate(const int peer_connection_id,
+WEBRTC_PLUGIN_API bool AddIceCandidate(int peer_connection_id,
                                        const char* candidate,
-                                       const int sdp_mlineindex,
+                                       int sdp_mlineindex,
                                        const char* sdp_mid);
 
 // Register callback functions.