Reland of Split iOS sdk in to separate targets

webrtc/sdk/objc/Framework/Classes/UI/RTCEAGLVideoView.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.
  */
 
@@ skipping 277 matching lines @@
 }
 
 - (void)ensureGLContext {
   NSAssert(_glContext, @"context shouldn't be nil");
   if ([EAGLContext currentContext] != _glContext) {
     [EAGLContext setCurrentContext:_glContext];
   }
 }
 
 @end