Revert of Rename AppRTCDemo on Android and iOS to AppRTCMobile

webrtc/examples/objc/AppRTCMobile/RTCMediaConstraints+JSON.m

-/*
- *  Copyright 2014 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 "RTCMediaConstraints+JSON.h"
-
-static NSString const *kRTCMediaConstraintsMandatoryKey = @"mandatory";
-
-@implementation RTCMediaConstraints (JSON)
-
-+ (RTCMediaConstraints *)constraintsFromJSONDictionary:
-    (NSDictionary *)dictionary {
-  NSDictionary *mandatory = dictionary[kRTCMediaConstraintsMandatoryKey];
-  NSMutableDictionary *mandatoryContraints =
-      [NSMutableDictionary dictionaryWithCapacity:[mandatory count]];
-  [mandatory enumerateKeysAndObjectsUsingBlock:^(
-      id key, id obj, BOOL *stop) {
-    mandatoryContraints[key] = obj;
-  }];
-  // TODO(tkchin): figure out json formats for optional constraints.
-  RTCMediaConstraints *constraints =
-      [[RTCMediaConstraints alloc]
-          initWithMandatoryConstraints:mandatoryContraints
-                   optionalConstraints:nil];
-  return constraints;
-}
-
-@end