Decoupling rtc_base from apple specific code [without cyclic deps]

webrtc/common_video/BUILD.gn

 # Copyright (c) 2014 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.gni")
 
@@ skipping 113 matching lines @@
       "//testing/gtest",
     ]
 
     data = common_video_resources
     if (is_android) {
       deps += [ "//testing/android/native_test:native_test_support" ]
       shard_timeout = 900
     }
 
     if (is_ios) {
-      deps += [ ":common_video_unittests_bundle_data" ]
+      deps += [
+        ":common_video_unittests_bundle_data",
+        "../rtc_base:rtc_base_apple",
+      ]
     }
   }
 }