Add several more suppressions related to the out-of-process plugin loading on Chromium OS
Add several more suppressions related to the out-of-process plugin loading on Chromium OS

In addition to the stacks suppressed before, there were several new PluginPrefs-related leaks that started at the same time.

TBR=thakis

BUG=102831

Review URL: http://codereview.chromium.org/8484008

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@108822 0039d316-1c4b-4281-b951-d872f2087c98

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