Update API for Objective-C RTCMediaConstraints.
BUG=
Review URL: https://codereview.webrtc.org/1543033003
Cr-Commit-Position: refs/heads/master@{#11172}
diff --git a/webrtc/api/objc/RTCMediaConstraints.h b/webrtc/api/objc/RTCMediaConstraints.h
new file mode 100644
index 0000000..a8ad391
--- /dev/null
+++ b/webrtc/api/objc/RTCMediaConstraints.h
@@ -0,0 +1,28 @@
+/*
+ * Copyright 2015 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.
+ */
+
+#import <Foundation/Foundation.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface RTCMediaConstraints : NSObject
+
+- (instancetype)init NS_UNAVAILABLE;
+
+/** Initialize with mandatory and/or optional constraints. */
+- (instancetype)initWithMandatoryConstraints:
+ (nullable NSDictionary<NSString *, NSString *> *)mandatory
+ optionalConstraints:
+ (nullable NSDictionary<NSString *, NSString *> *)optional
+ NS_DESIGNATED_INITIALIZER;
+
+@end
+
+NS_ASSUME_NONNULL_END