Use relative paths in GN files.

webrtc/media/BUILD.gn

 # Copyright (c) 2016 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("//build/config/linux/pkg_config.gni")
 import("../webrtc.gni")
@@ skipping 379 matching lines @@
         # for -Wno-sign-compare
         "-Wno-sign-compare",
       ]
     }
     if (!is_win) {
       cflags = [ "-Wno-sign-compare" ]
     }
   }
 
   rtc_media_unittests_resources = [
-    "//resources/media/captured-320x240-2s-48.frames",
-    "//resources/media/faces.1280x720_P420.yuv",
-    "//resources/media/faces_I420.jpg",
-    "//resources/media/faces_I422.jpg",
-    "//resources/media/faces_I444.jpg",
-    "//resources/media/faces_I411.jpg",
-    "//resources/media/faces_I400.jpg",
+    "../../resources/media/captured-320x240-2s-48.frames",
+    "../../resources/media/faces.1280x720_P420.yuv",
+    "../../resources/media/faces_I420.jpg",
+    "../../resources/media/faces_I422.jpg",
+    "../../resources/media/faces_I444.jpg",
+    "../../resources/media/faces_I411.jpg",
+    "../../resources/media/faces_I400.jpg",
   ]
 
   if (is_ios) {
     bundle_data("rtc_media_unittests_bundle_data") {
       testonly = true
       sources = rtc_media_unittests_resources
       outputs = [
         "{{bundle_resources_dir}}/{{source_file_part}}",
       ]
     }
@@ skipping 104 matching lines @@
       "../modules/video_coding:video_coding_utility",
       "../modules/video_coding:webrtc_vp8",
       "../p2p:p2p_test_utils",
       "../system_wrappers:metrics_default",
       "../test:audio_codec_mocks",
       "../test:test_support",
       "../voice_engine:voice_engine",
     ]
   }
 }