Use relative names in GN to make Chromium happy

webrtc/modules/audio_coding/BUILD.gn

Index: webrtc/modules/audio_coding/BUILD.gn
diff --git a/webrtc/modules/audio_coding/BUILD.gn b/webrtc/modules/audio_coding/BUILD.gn
index 6f47dcce949005d93beeddcb4a2f31713f894a9c..81e07920b2baf06a603bbda8d670ba723ee862de 100644
--- a/webrtc/modules/audio_coding/BUILD.gn
+++ b/webrtc/modules/audio_coding/BUILD.gn
@@ -45,7 +45,7 @@ rtc_static_library("audio_format") {
     "codecs/audio_format.h",
   ]
   deps = [
-    "//webrtc:webrtc_common",
+    "../..:webrtc_common",
   ]
 }
 
@@ -56,8 +56,8 @@ rtc_static_library("audio_format_conversion") {
   ]
   deps = [
     ":audio_format",
-    "//webrtc:webrtc_common",
-    "//webrtc/base:rtc_base_approved",
+    "../..:webrtc_common",
+    "../../base:rtc_base_approved",
   ]
 }
 
@@ -68,7 +68,7 @@ rtc_source_set("audio_decoder_factory_interface") {
   deps = [
     ":audio_decoder_interface",
     ":audio_format",
-    "//webrtc/base:rtc_base_approved",
+    "../../base:rtc_base_approved",
   ]
 }