Opus: Move complexity variable out of conditional build flag

webrtc/modules/audio_coding/BUILD.gn

Index: webrtc/modules/audio_coding/BUILD.gn
diff --git a/webrtc/modules/audio_coding/BUILD.gn b/webrtc/modules/audio_coding/BUILD.gn
index 8c5a07982885461696683ab6aaffc6f327d985a2..7bd8adfd8d3664e69a946f5bf62b7bb914dea1f1 100644
--- a/webrtc/modules/audio_coding/BUILD.gn
+++ b/webrtc/modules/audio_coding/BUILD.gn
@@ -713,16 +713,16 @@ rtc_static_library("webrtc_opus") {
   ]
 
   defines = []
+  if (rtc_opus_variable_complexity) {
+    defines += [ "WEBRTC_OPUS_VARIABLE_COMPLEXITY=1" ]
+  } else {
+    defines += [ "WEBRTC_OPUS_VARIABLE_COMPLEXITY=0" ]
+  }
 
   if (rtc_build_opus) {
     public_deps = [
       rtc_opus_dir,
     ]
-    if (rtc_opus_variable_complexity) {
-      defines += [ "WEBRTC_OPUS_VARIABLE_COMPLEXITY=1" ]
-    } else {
-      defines += [ "WEBRTC_OPUS_VARIABLE_COMPLEXITY=0" ]
-    }
   } else if (build_with_mozilla) {
     include_dirs = [ getenv("DIST") + "/include/opus" ]
   }