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

chrome/installer/linux/common/prerm.include

Index: chrome/installer/linux/common/prerm.include
diff --git a/chrome/installer/linux/common/prerm.include b/chrome/installer/linux/common/prerm.include
index 5bb2c4005d7dd444e693cec135bbc485240263fa..d72d599f0b348dccee4a7ddba09b78d23d335a81 100644
--- a/chrome/installer/linux/common/prerm.include
+++ b/chrome/installer/linux/common/prerm.include
@@ -9,6 +9,11 @@ for icon in "@@INSTALLDIR@@/product_logo_"*.png; do
   "$XDG_ICON_RESOURCE" uninstall --size "${size%.png}" "@@PACKAGE@@"
 done
 
+for icon in "@@INSTALLDIR@@/product_symbolic_logo_"*.symbolic.png; do

[Tom (Use chromium acct), 2017/02/23 03:11:35]

Ditto

+  size="${icon##*/product_symbolic_logo_}"
+  "$XDG_ICON_RESOURCE" uninstall --size "${size%.symbolic.png}" "@@PACKAGE@@-symbolic.symbolic"
+done
+
 UPDATE_MENUS="`which update-menus 2> /dev/null || true`"
 if [ -x "$UPDATE_MENUS" ]; then
   update-menus