Don't build remoting host on ChromeOS. The host doesn't currently compile on the ChromeOS builders because it uses GTK.
Don't build remoting host on ChromeOS.
The host doesn't currently compile on the ChromeOS builders because it uses GTK.

BUG=None
TEST=ChromeOS build bot is green.

Review URL: https://chromiumcodereview.appspot.com/9390029

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@121959 0039d316-1c4b-4281-b951-d872f2087c98

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