Fix Chrome build on Chrome OS chroot.

Fix for the error in CrOS SDK because of the older clang
version that does not support '-debug-info-kind=constructor':
chromeos-chrome-82.0.4061.0_rc-r1: error:
invalid value 'constructor' in '-debug-info-kind=constructor

Bug: 1050118
Change-Id: I5b5b038027c6111ba6501e23e4b46f23f664fae9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2062251
Commit-Queue: Manoj Gupta <manojgupta@chromium.org>
Auto-Submit: Manoj Gupta <manojgupta@chromium.org>
Reviewed-by: Takuto Ikuta <tikuta@chromium.org>
Reviewed-by: Ben Pastene <bpastene@chromium.org>
Reviewed-by: Fergus Dall <sidereal@google.com>
Cr-Commit-Position: refs/heads/master@{#742471}

build/config/compiler/BUILD.gn

@@ -2349,8 +2349,10 @@ config("symbols") {
       cflags += [ "-g2" ]
     }
 
-    if (is_clang && !is_nacl && (!is_chromeos || default_toolchain !=
-                                                 "//build/toolchain/cros:target")) {
+    # TODO: Remove cros specific logic once cros clang supports
+    # "-debug-info-kind=constructor" option.
+    if (is_clang && !is_nacl &&
+        default_toolchain != "//build/toolchain/cros:target") {
       cflags += [
         "-Xclang",
         "-debug-info-kind=constructor",