Expand is_linux to is_linux || is_chromeos.

Currently is_linux is set to true on Chrome OS build,
but it is planned to be set false. This CL is the preparation
to keep the compatibility.

Bug: chromium:1110266
Test: Build locally.
Change-Id: Ic79a202b0b3baeff157955cd03a07556bfb958a8
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/183860
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Commit-Queue: Hidehiko Abe <hidehiko@chromium.org>
Cr-Commit-Position: refs/heads/master@{#32073}
diff --git a/examples/BUILD.gn b/examples/BUILD.gn
index 822f194..557e31f 100644
--- a/examples/BUILD.gn
+++ b/examples/BUILD.gn
@@ -45,7 +45,7 @@
     deps += [ ":AppRTCMobile" ]
   }
 
-  if (is_linux || is_win) {
+  if (is_linux || is_chromeos || is_win) {
     deps += [
       ":peerconnection_server",
       ":stunserver",
@@ -647,7 +647,7 @@
   }
 }
 
-if (is_linux || is_win) {
+if (is_linux || is_chromeos || is_win) {
   rtc_executable("peerconnection_client") {
     testonly = true
     sources = [
@@ -691,7 +691,7 @@
       configs += [ "//build/config/win:windowed" ]
       deps += [ "../media:rtc_media_base" ]
     }
-    if (is_linux) {
+    if (is_linux || is_chromeos) {
       sources += [
         "peerconnection/client/linux/main.cc",
         "peerconnection/client/linux/main_wnd.cc",