Use relative paths in GN files.

webrtc/api/BUILD.gn

 # 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.
 
 import("../webrtc.gni")
 if (is_android) {
@@ skipping 204 matching lines @@
     testonly = true
     sources = [
       "test/mock_audio_mixer.h",
     ]
 
     public_deps = [
       ":audio_mixer_api",
     ]
 
     deps = [
+      "../test:test_support",
       "//testing/gmock",
-      "//webrtc/test:test_support",
     ]
   }
 
   rtc_source_set("fakemetricsobserver") {
     testonly = true
     sources = [
       "fakemetricsobserver.cc",
       "fakemetricsobserver.h",
     ]
     deps = [
       ":libjingle_peerconnection_api",
       "../base:rtc_base_approved",
     ]
     if (!build_with_chromium && is_clang) {
       # Suppress warnings from the Chromium Clang plugin (bugs.webrtc.org/163).
       suppressed_configs += [ "//build/config/clang:find_bad_constructs" ]
     }
   }
 
   rtc_source_set("rtc_api_unittests") {
     testonly = true
 
     # Skip restricting visibility on mobile platforms since the tests on those
     # gets additional generated targets which would require many lines here to
     # cover (which would be confusing to read and hard to maintain).
     if (!is_android && !is_ios) {
-      visibility = [ "//webrtc:rtc_unittests" ]
+      visibility = [ "..:rtc_unittests" ]
     }
     sources = [
       "ortc/mediadescription_unittest.cc",
       "ortc/sessiondescription_unittest.cc",
       "rtcerror_unittest.cc",
     ]
 
     if (!build_with_chromium && is_clang) {
       # Suppress warnings from the Chromium Clang plugin (bugs.webrtc.org/163).
       suppressed_configs += [ "//build/config/clang:find_bad_constructs" ]
     }
 
     deps = [
       ":libjingle_peerconnection_api",
       ":ortc_api",
-      "//webrtc/test:test_support",
+      "../test:test_support",
     ]
   }
 }