Propagate bitrate setting to RTCRtpSender.

webrtc/examples/objc/AppRTCMobile/tests/ARDSettingsModelTests.mm

 /*
  *  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 21 matching lines @@
 - (instancetype)init {
   self = [super init];
   if (self) {
     _model = [[ARDSettingsModel alloc] init];
   }
   return self;
 }
 
 - (id)setupMockStoreWithMediaConstraintString:(NSString *)constraintString {
   id storeMock = [OCMockObject mockForClass:[ARDSettingsStore class]];
-  [([[storeMock stub] andReturn:constraintString]) videoResolutionConstraintsSetting];
+  [([[storeMock stub] andReturn:constraintString]) videoResolutionConstraints];
 
   id partialMock = [OCMockObject partialMockForObject:_model];
   [[[partialMock stub] andReturn:storeMock] settingsStore];
 
   return storeMock;
 }
 
 - (void)testDefaultMediaFromStore {
   // given
   id storeMock = [self setupMockStoreWithMediaConstraintString:nil];
 
-  [[storeMock expect] setVideoResolutionConstraintsSetting:@"640x480"];
+  [[storeMock expect] setVideoResolutionConstraints:@"640x480"];
 
   // when
   NSString *string = [_model currentVideoResoultionConstraintFromStore];
 
   // then
   EXPECT_TRUE([string isEqualToString:@"640x480"]);
   [storeMock verify];
 }
 
 - (void)testStoringInavlidConstraintReturnsNo {
@@ skipping 85 matching lines @@
   @autoreleasepool {
     [test testConstraintComponentIsNilWhenInvalidConstraintString];
   }
 }
 
 TEST_F(ARDSettingsModelTest, DictionaryIsNil) {
   @autoreleasepool {
     [test testConstraintsDictionaryIsNilWhenInvalidConstraintString];
   }
 }