rtc_use_h264 flag for building OpenH264/FFmpeg

webrtc/modules/video_coding/codecs/h264/h264.gypi

 # 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.
 
 {
   'includes': [
     '../../../../build/common.gypi',
   ],
   'targets': [
     {
       'target_name': 'webrtc_h264',
       'type': 'static_library',
       'conditions': [
         ['OS=="ios"', {
           'dependencies': [
             'webrtc_h264_video_toolbox',
           ],
           'sources': [
             'h264_objc.mm',
           ],
         }],
+        ['rtc_use_h264==1', {
+          # Dependency for sake of compiling The dependencies will be used for
+          # real as soon as https://codereview.webrtc.org/1306813009/ lands.
+          'dependencies': [
+            '<(DEPTH)/third_party/ffmpeg/ffmpeg.gyp:ffmpeg',
+            '<(DEPTH)/third_party/openh264/openh264.gyp:openh264_encoder',
+          ],
+        }],
       ],
       'sources': [
         'h264.cc',
         'include/h264.h',
       ],
     }, # webrtc_h264
   ],
   'conditions': [
     ['OS=="ios"', {
       'targets': [
@@ skipping 18 matching lines @@
             'h264_video_toolbox_encoder.cc',
             'h264_video_toolbox_encoder.h',
             'h264_video_toolbox_nalu.cc',
             'h264_video_toolbox_nalu.h',
           ],
         }, # webrtc_h264_video_toolbox
       ], # targets
     }], # OS=="ios"
   ], # conditions
 }