Propagate bitrate setting to RTCRtpSender.

webrtc/examples/objc/AppRTCMobile/ios/ARDSettingsModel.m

 /*
  *  Copyright 2016 The WebRTC Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 11 matching lines @@
 }
 @end
 
 @implementation ARDSettingsModel
 
 - (NSArray<NSString *> *)availableVideoResoultionsMediaConstraints {
   return videoResolutionsStaticValues();
 }
 
 - (NSString *)currentVideoResoultionConstraintFromStore {
-  NSString *constraint = [[self settingsStore] videoResolutionConstraintsSetting];
+  NSString *constraint = [[self settingsStore] videoResolutionConstraints];
   if (!constraint) {
     constraint = [self defaultVideoResolutionMediaConstraint];
     // To ensure consistency add the default to the store.
-    [[self settingsStore] setVideoResolutionConstraintsSetting:constraint];
+    [[self settingsStore] setVideoResolutionConstraints:constraint];
   }
   return constraint;
 }
 
 - (BOOL)storeVideoResoultionConstraint:(NSString *)constraint {
   if (![[self availableVideoResoultionsMediaConstraints] containsObject:constraint]) {
     return NO;
   }
-  [[self settingsStore] setVideoResolutionConstraintsSetting:constraint];
+  [[self settingsStore] setVideoResolutionConstraints:constraint];
   return YES;
 }
 
+- (nullable NSNumber *)currentMaxBitrateSettingFromStore {
+  return [[self settingsStore] maxBitrate];
+}
+
+- (void)storeMaxBitrateSetting:(nullable NSNumber *)bitrate {
+  [[self settingsStore] setMaxBitrate:bitrate];
+}
+
 #pragma mark - Testable
 
 - (ARDSettingsStore *)settingsStore {
   if (!_settingsStore) {
     _settingsStore = [[ARDSettingsStore alloc] init];
   }
   return _settingsStore;
 }
 
 - (nullable NSString *)currentVideoResolutionWidthFromStore {
@@ skipping 36 matching lines @@
     mediaConstraintsDictionary = @{
       kRTCMediaConstraintsMinWidth : widthConstraint,
       kRTCMediaConstraintsMinHeight : heightConstraint
     };
   }
   return mediaConstraintsDictionary;
 }
 
 @end
 NS_ASSUME_NONNULL_END