Adding AecDump functionality to AppRTCDemo for iOS

BUG=webrtc:6229

Review-Url: https://codereview.webrtc.org/2253013006
Cr-Commit-Position: refs/heads/master@{#13927}
diff --git a/webrtc/examples/objc/AppRTCDemo/ios/ARDMainView.h b/webrtc/examples/objc/AppRTCDemo/ios/ARDMainView.h
index a783ca1..e9f4991 100644
--- a/webrtc/examples/objc/AppRTCDemo/ios/ARDMainView.h
+++ b/webrtc/examples/objc/AppRTCDemo/ios/ARDMainView.h
@@ -15,10 +15,11 @@
 @protocol ARDMainViewDelegate <NSObject>
 
 - (void)mainView:(ARDMainView *)mainView
-      didInputRoom:(NSString *)room
-        isLoopback:(BOOL)isLoopback
-       isAudioOnly:(BOOL)isAudioOnly
-    useManualAudio:(BOOL)useManualAudio;
+         didInputRoom:(NSString *)room
+           isLoopback:(BOOL)isLoopback
+          isAudioOnly:(BOOL)isAudioOnly
+    shouldMakeAecDump:(BOOL)shouldMakeAecDump
+       useManualAudio:(BOOL)useManualAudio;
 
 - (void)mainViewDidToggleAudioLoop:(ARDMainView *)mainView;