Disable in-browser thumbnailing for Linux and Chrome OS.
Disable in-browser thumbnailing for Linux and Chrome OS.

I expected r87445 was sufficient to fix valgrind errors but
it turned there were more. For now, we should diable this.

BUG=65936,84584
TEST=valgrind bots should stop sending reports.

Review URL: http://codereview.chromium.org/7057054
Patch from Satoru Takabayashi <satorux@chromium.org>.

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@87458 0039d316-1c4b-4281-b951-d872f2087c98

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