installer/linux: add symbolic icon for use in gnome-shell

chrome/installer/linux/BUILD.gn

 # Copyright 2015 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/chrome_build.gni")
 import("//build/config/features.gni")
 import("//build/config/sanitizers/sanitizers.gni")
 import("//build/config/sysroot.gni")
 import("//build/util/process_version.gni")
 import("//build/util/version.gni")
@@ skipping 108 matching lines @@
   outputs = [
     "$root_out_dir/installer/debian/{{source_file_part}}",
   ]
 }
 
 copy("theme_files") {
   visibility = [ ":*" ]
   sources = [
     "$branding_dir/BRANDING",
     "$branding_dir/linux/product_logo_32.xpm",
+    "$branding_dir/linux/product_symbolic_logo_16.symbolic.png",
+    "$branding_dir/linux/product_symbolic_logo_32.symbolic.png",
     "$branding_dir/product_logo_128.png",
     "$branding_dir/product_logo_22.png",
     "$branding_dir/product_logo_24.png",
     "$branding_dir/product_logo_256.png",
     "$branding_dir/product_logo_48.png",
     "$branding_dir/product_logo_64.png",
     "$branding_dir_100/product_logo_16.png",
     "$branding_dir_100/product_logo_32.png",
   ]
   outputs = [
@@ skipping 222 matching lines @@
 # Other packages that we support that aren't included in the default "linux"
 # target.
 linux_package("trunk") {
   channel = "trunk"
 }
 if (is_asan) {
   linux_package("asan") {
     channel = "asan"
   }
 }