cros: Pass -Wa,-fdebug-compilation-dir,. now that cros's clang understands it.

Bug: 917357
Change-Id: I6a0039a8357150f7b5e6c27f486bac8736ce4577
Reviewed-on: https://chromium-review.googlesource.com/c/1405281
Reviewed-by: Steven Bennetts <stevenjb@chromium.org>
Commit-Queue: Nico Weber <thakis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#622329}
diff --git a/build/config/compiler/BUILD.gn b/build/config/compiler/BUILD.gn
index 0e2d865..4cd2180 100644
--- a/build/config/compiler/BUILD.gn
+++ b/build/config/compiler/BUILD.gn
@@ -1177,9 +1177,8 @@
   # TODO(thakis): Once openmax_dl no longer uses -fno-integrated-as, move
   # this behind the -fdebug-compilation-dir cflags in the "compiler" config.
   if (symbol_level != 0 && is_clang && strip_absolute_paths_from_debug_symbols) {
-    if (!is_win && target_os != "chromeos") {
+    if (!is_win) {
       # We don't use clang -cc1as on Windows (yet? https://crbug.com/762167)
-      # Chrome OS's clang doesn't know this flag yet, https://crbug.com/917357
       asmflags = [ "-Wa,-fdebug-compilation-dir,." ]
     }
   }