Revert of Split iOS sdk in to separate targets

webrtc/sdk/objc/Framework/Classes/Common/RTCDispatcher.m

-/*
- *  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 "RTCDispatcher+Private.h"
-
-static dispatch_queue_t kAudioSessionQueue = nil;
-static dispatch_queue_t kCaptureSessionQueue = nil;
-
-@implementation RTCDispatcher
-
-+ (void)initialize {
-  static dispatch_once_t onceToken;
-  dispatch_once(&onceToken, ^{
-    kAudioSessionQueue = dispatch_queue_create(
-        "org.webrtc.RTCDispatcherAudioSession",
-        DISPATCH_QUEUE_SERIAL);
-    kCaptureSessionQueue = dispatch_queue_create(
-        "org.webrtc.RTCDispatcherCaptureSession",
-        DISPATCH_QUEUE_SERIAL);
-  });
-}
-
-+ (void)dispatchAsyncOnType:(RTCDispatcherQueueType)dispatchType
-                      block:(dispatch_block_t)block {
-  dispatch_queue_t queue = [self dispatchQueueForType:dispatchType];
-  dispatch_async(queue, block);
-}
-
-+ (BOOL)isOnQueueForType:(RTCDispatcherQueueType)dispatchType {
-  dispatch_queue_t targetQueue = [self dispatchQueueForType:dispatchType];
-  const char* targetLabel = dispatch_queue_get_label(targetQueue);
-  const char* currentLabel = dispatch_queue_get_label(DISPATCH_CURRENT_QUEUE_LABEL);
-
-  NSAssert(strlen(targetLabel) > 0, @"Label is required for the target queue.");
-  NSAssert(strlen(currentLabel) > 0, @"Label is required for the current queue.");
-
-  return strcmp(targetLabel, currentLabel) == 0;
-}
-
-#pragma mark - Private
-
-+ (dispatch_queue_t)dispatchQueueForType:(RTCDispatcherQueueType)dispatchType {
-  switch (dispatchType) {
-    case RTCDispatcherTypeMain:
-      return dispatch_get_main_queue();
-    case RTCDispatcherTypeCaptureSession:
-      return kCaptureSessionQueue;
-    case RTCDispatcherTypeAudioSession:
-      return kAudioSessionQueue;
-  }
-}
-
-@end
-