<chromium> Fix autogenerated env.bat files for Windows builds.

Removes the addition of 'component=share_library' from GYP_DEFINES.
This caused a build error due to missing files.

Change-Id: I062e7f8ba7d28f298df4bee289e24b495875dc5f
Reviewed-by: Frederik Gladhorn <frederik.gladhorn@digia.com>