UserAgent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:47.0) Gecko/20100101 Firefox/47.0

Steps to reproduce the problem:
Create a shell script beginning with the following content, where "/bin/sh" is actually a symlink to dash (e.g. in Ubuntu 14.04):
--------
#!/bin/sh

. src/chrome/installer/linux/common/installer.include
--------

What is the expected behavior?
The script should run successfully.

What went wrong?
The script failed with error.

Did this work before? N/A 

Chrome version:   Channel: n/a
OS Version: 
Flash Version: 

src/chrome/installer/linux/common/installer.include uses syntax valid in bash, but invalid in dash. It would be helpful if these non-portable syntax can be avoided, so that other Linux distributions which use dash as the default shell can re-use this script for packaging Chromium.