Disable crashing unit test on Linux.
Disable crashing unit test on Linux.

Working on the bots, but failing locally. Possibly a KDE / Gnome
difference, as it involves Gnome-specific code in PowerSaveBlocker.

BUG=110886
Test=content_unittests

Review URL: http://codereview.chromium.org/9325069

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@121230 0039d316-1c4b-4281-b951-d872f2087c98

gavinp/chromium,adobe/chromium,yitian134/chromium,ropik/chromium,ropik/chromium,yitian134/chromium,adobe/chromium,ropik/chromium,adobe/chromium,yitian134/chromium,adobe/chromium,yitian134/chromium,yitian134/chromium,ropik/chromium,yitian134/chromium,gavinp/chromium,gavinp/chromium,adobe/chromium,yitian134/chromium,gavinp/chromium,ropik/chromium,adobe/chromium,gavinp/chromium,adobe/chromium,ropik/chromium,ropik/chromium,ropik/chromium,adobe/chromium,ropik/chromium,gavinp/chromium,yitian134/chromium,yitian134/chromium,adobe/chromium,adobe/chromium,gavinp/chromium,gavinp/chromium,gavinp/chromium,adobe/chromium,gavinp/chromium,yitian134/chromium