Pass settings model to ARDAppClient instead of individual settings.

webrtc/examples/objc/AppRTCMobile/ARDAppClient.h

Index: webrtc/examples/objc/AppRTCMobile/ARDAppClient.h
diff --git a/webrtc/examples/objc/AppRTCMobile/ARDAppClient.h b/webrtc/examples/objc/AppRTCMobile/ARDAppClient.h
index 0feb01586aab2a0760267f591c3012d6a477886b..933dc6b1a01bb5fb63cf45945985b620d6485fbb 100644
--- a/webrtc/examples/objc/AppRTCMobile/ARDAppClient.h
+++ b/webrtc/examples/objc/AppRTCMobile/ARDAppClient.h
@@ -23,6 +23,7 @@ typedef NS_ENUM(NSInteger, ARDAppClientState) {
 };
 
 @class ARDAppClient;
+@class ARDSettingsModel;
 @class RTCMediaConstraints;
 
 // The delegate is informed of pertinent events and will be called on the
@@ -60,22 +61,17 @@ typedef NS_ENUM(NSInteger, ARDAppClientState) {
 @property(nonatomic, weak) id<ARDAppClientDelegate> delegate;
 // Convenience constructor since all expected use cases will need a delegate
 // in order to receive remote tracks.
-- (instancetype)initWithDelegate:(id<ARDAppClientDelegate>)delegate
-                preferVideoCodec:(NSString*)codec;
-
-// Sets camera constraints.
-- (void)setCameraConstraints:(RTCMediaConstraints *)mediaConstraints;
-
-// Sets maximum bitrate the rtp sender should use.
-- (void)setMaxBitrate:(NSNumber *)maxBitrate;
+- (instancetype)initWithDelegate:(id<ARDAppClientDelegate>)delegate;
 
 // Establishes a connection with the AppRTC servers for the given room id.
+// |settings| is an object containing settings such as video codec for the call.
 // If |isLoopback| is true, the call will connect to itself.
 // If |isAudioOnly| is true, video will be disabled for the call.
 // If |shouldMakeAecDump| is true, an aecdump will be created for the call.
 // If |shouldUseLevelControl| is true, the level controller will be used
 // in the call.
 - (void)connectToRoomWithId:(NSString *)roomId
+                   settings:(ARDSettingsModel *)settings
                  isLoopback:(BOOL)isLoopback
                 isAudioOnly:(BOOL)isAudioOnly
           shouldMakeAecDump:(BOOL)shouldMakeAecDump