webrtc/base: Use RTC_DCHECK() instead of assert()

webrtc/base/maccocoasocketserver.mm

 /*
  *  Copyright 2012 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 "webrtc/base/maccocoasocketserver.h"
 
 #import <Foundation/Foundation.h>
 #import <AppKit/AppKit.h>
-#include <assert.h>
 
 #include "webrtc/base/scoped_autorelease_pool.h"
 
 // MacCocoaSocketServerHelperRtc serves as a delegate to NSMachPort or a target for
 // a timeout.
 @interface MacCocoaSocketServerHelperRtc : NSObject {
   // This is a weak reference. This works fine since the
   // rtc::MacCocoaSocketServer owns this object.
   rtc::MacCocoaSocketServer* socketServer_;  // Weak.
 }
@@ skipping 106 matching lines @@
   // [NSApp isRunning] returns unexpected results when called from another
   // thread.  Maintain our own count of how many times to break the main loop.
   if (run_count_ > 0) {
     [helper_ performSelectorOnMainThread:@selector(breakMainloop)
                               withObject:nil
                            waitUntilDone:false];
   }
 }
 
 }  // namespace rtc