Build dynamic iOS SDK.

webrtc/sdk/objc/Framework/Classes/RTCCameraPreviewView.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.
  */
 
-#if !defined(__has_feature) || !__has_feature(objc_arc)
-#error "This file requires ARC support."
-#endif
-
-#import "webrtc/base/objc/RTCCameraPreviewView.h"
+#import "WebRTC/RTCCameraPreviewView.h"
 
 #import <AVFoundation/AVFoundation.h>
 
-#import "webrtc/base/objc/RTCDispatcher.h"
+#import "RTCDispatcher+Private.h"
 
 @implementation RTCCameraPreviewView
 
 @synthesize captureSession = _captureSession;
 
 + (Class)layerClass {
   return [AVCaptureVideoPreviewLayer class];
 }
 
 - (void)setCaptureSession:(AVCaptureSession *)captureSession {
   if (_captureSession == captureSession) {
     return;
   }
   _captureSession = captureSession;
   AVCaptureVideoPreviewLayer *previewLayer = [self previewLayer];
   [RTCDispatcher dispatchAsyncOnType:RTCDispatcherTypeCaptureSession
                                block:^{
     previewLayer.session = captureSession;
   }];
 }
 
 #pragma mark - Private
 
 - (AVCaptureVideoPreviewLayer *)previewLayer {
   return (AVCaptureVideoPreviewLayer *)self.layer;
 }
 
 @end