Decoupling rtc_base from apple specific code [without cyclic deps]

webrtc/examples/BUILD.gn

Index: webrtc/examples/BUILD.gn
diff --git a/webrtc/examples/BUILD.gn b/webrtc/examples/BUILD.gn
index 726b5ba0a5da1f38493f8237e7589fe070ab7cf9..d65736104f66fe298c0cdf47bf3b64bf1d264a6c 100644
--- a/webrtc/examples/BUILD.gn
+++ b/webrtc/examples/BUILD.gn
@@ -439,6 +439,7 @@ if (is_ios || (is_mac && target_cpu != "x86")) {
         ]
         deps = [
           ":apprtcmobile_test_sources",
+          "../rtc_base:rtc_base_apple",
         ]
         ldflags = [ "-all_load" ]
       }
@@ -670,5 +671,9 @@ if (!build_with_chromium) {
       "../p2p:rtc_p2p",
       "../system_wrappers:field_trial_default",
     ]
+
+    if (is_ios || is_mac) {
+      deps += [ "../rtc_base:rtc_base_apple" ]
+    }
   }
 }