Compile rtc_base_objc and rtc_api_objc for Mac

webrtc/base/macwindowpicker.cc

Index: webrtc/base/macwindowpicker.cc
diff --git a/webrtc/base/macwindowpicker.cc b/webrtc/base/macwindowpicker.cc
index bb97d20f1ac493caceab92eca813b5558a0931bf..c61fa29d6555d8c127e436fe4bc8872235f82a47 100644
--- a/webrtc/base/macwindowpicker.cc
+++ b/webrtc/base/macwindowpicker.cc
@@ -160,6 +160,9 @@ bool MacWindowPicker::MoveToFront(const WindowId& id) {
     // to front might be behind another X application.
     ProcessSerialNumber psn;
     pid_t pid = pid_val;
+// TODO(5478): Update deprecated APIs.
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated"
     int res = GetProcessForPID(pid, &psn);
     if (res != 0) {
       LOG(LS_ERROR) << "Failed getting process for pid";
@@ -170,6 +173,7 @@ bool MacWindowPicker::MoveToFront(const WindowId& id) {
       LOG(LS_ERROR) << "Failed setting process to front";
       result = false;
     }
+#pragma clang diagnostic pop
   }
   CFRelease(window_id_array);
   CFRelease(window_array);