Updated #if in IsH264CodecSupported to match H264[En/De]coder::Create.

webrtc/modules/video_coding/codecs/h264/h264.cc

 /*
  *  Copyright (c) 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 30 matching lines @@
 
 // We need this file to be C++ only so it will compile properly for all
 // platforms. In order to write ObjC specific implementations we use private
 // externs. This function is defined in h264.mm.
 #if defined(WEBRTC_IOS)
 extern bool IsH264CodecSupportedObjC();
 #endif
 
 // If any H.264 codec is supported (iOS HW or OpenH264/FFmpeg).
 bool IsH264CodecSupported() {
-#if defined(WEBRTC_IOS)
+#if defined(WEBRTC_IOS) && defined(WEBRTC_VIDEO_TOOLBOX_SUPPORTED)
   if (IsH264CodecSupportedObjC()) {
     return true;
   }
 #endif
 #if defined(WEBRTC_USE_H264)
   return g_rtc_use_h264;
 #else
   return false;
 #endif
 }
@@ skipping 36 matching lines @@
   RTC_NOTREACHED();
   return nullptr;
 #endif
 }
 
 bool H264Decoder::IsSupported() {
   return IsH264CodecSupported();
 }
 
 }  // namespace webrtc