Gave two global instance variables unique names

in jumbo builds two files with global variables named
instance clashed. This renames them to
g_transient_window_client_instance and
g_window_stacking_client_instance

Bug: 773275
Change-Id: I29dd9ef7e792959b128e99242b6ec6e13be183a8
Reviewed-on: https://chromium-review.googlesource.com/786236
Reviewed-by: Sadrul Chowdhury <sadrul@chromium.org>
Commit-Queue: Daniel Bratell <bratell@opera.com>
Cr-Commit-Position: refs/heads/master@{#519277}
2 files changed