mac/gn: Unbreak video_encode_accelerator_unittest after https://codereview.chromium.org/1818903004

media/gpu/BUILD.gn

 # Copyright 2016 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//media/gpu/args.gni")
 import("//media/media_options.gni")
 import("//testing/test.gni")
 
@@ skipping 168 matching lines @@
   if (is_mac) {
     sources += [
                  "vt_mac.h",
                  "vt_video_decode_accelerator_mac.cc",
                  "vt_video_decode_accelerator_mac.h",
                  "vt_video_encode_accelerator_mac.cc",
                  "vt_video_encode_accelerator_mac.h",
                ] + get_target_outputs(":libvt_generate_stubs")
     deps += [
       ":libvt_generate_stubs",
-      "//third_party/webrtc/common_video",
       "//third_party/webrtc/system_wrappers",
     ]
+    public_deps += [ "//third_party/webrtc/common_video" ]
     libs += [
       "CoreFoundation.framework",
       "Foundation.framework",
       "QuartzCore.framework",
     ]
   }
 
   if (is_android) {
     sources += [
       "android_copying_backing_strategy.cc",
@@ skipping 245 matching lines @@
       "video_encode_accelerator_unittest.cc",
     ]
     if (use_x11) {
       deps += [ "//ui/gfx/x" ]
     }
     if (use_ozone) {
       deps += [ "//ui/ozone" ]
     }
   }
 }