Use relative paths in GN files.

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 59 matching lines @@
   if (rtc_build_libyuv) {
     deps += [ "$rtc_libyuv_dir" ]
     public_deps += [ "$rtc_libyuv_dir" ]
   } else {
     # Need to add a directory normally exported by libyuv.
     include_dirs += [ "$rtc_libyuv_dir/include" ]
   }
 }
 
 if (rtc_include_tests) {
-  common_video_resources = [ "//resources/foreman_cif.yuv" ]
+  common_video_resources = [ "../../resources/foreman_cif.yuv" ]
 
   if (is_ios) {
     bundle_data("common_video_unittests_bundle_data") {
       testonly = true
       sources = common_video_resources
       outputs = [
         "{{bundle_resources_dir}}/{{source_file_part}}",
       ]
     }
   }
@@ skipping 37 matching lines @@
     if (is_android) {
       deps += [ "//testing/android/native_test:native_test_support" ]
       shard_timeout = 900
     }
 
     if (is_ios) {
       deps += [ ":common_video_unittests_bundle_data" ]
     }
   }
 }