Use relative paths in GN files.

webrtc/test/BUILD.gn

Index: webrtc/test/BUILD.gn
diff --git a/webrtc/test/BUILD.gn b/webrtc/test/BUILD.gn
index f54a62252db21efec8ff951d10c4b806af0088c1..2719db451dd2dcd37263020818cf43bf15493509 100644
--- a/webrtc/test/BUILD.gn
+++ b/webrtc/test/BUILD.gn
@@ -249,13 +249,13 @@ if (!build_with_chromium) {
   }
 
   test_support_unittests_resources = [
-    "//resources/foreman_cif_short.yuv",
-    "//resources/video_coding/frame-ethernet-ii.pcap",
-    "//resources/video_coding/frame-loopback.pcap",
-    "//resources/video_coding/pltype103.rtp",
-    "//resources/video_coding/pltype103_header_only.rtp",
-    "//resources/video_coding/ssrcs-2.pcap",
-    "//resources/video_coding/ssrcs-3.pcap",
+    "../../resources/foreman_cif_short.yuv",
+    "../../resources/video_coding/frame-ethernet-ii.pcap",
+    "../../resources/video_coding/frame-loopback.pcap",
+    "../../resources/video_coding/pltype103.rtp",
+    "../../resources/video_coding/pltype103_header_only.rtp",
+    "../../resources/video_coding/ssrcs-2.pcap",
+    "../../resources/video_coding/ssrcs-3.pcap",
   ]
 
   if (is_ios) {
@@ -606,8 +606,8 @@ if (!build_with_chromium && is_android) {
       "android/org/webrtc/native_test/RTCNativeUnitTestActivity.java",
     ]
     deps = [
+      "../rtc_base:base_java",
       "//testing/android/native_test:native_test_java",
-      "//webrtc/rtc_base:base_java",
     ]
   }
 }