Split the layout tests run in the appcache ui tests into two groups, PHP dependent vs non-dependent. Also remove some tests that are racey from the layout tests run in these test cases.
Split the layout tests run in the appcache ui tests into two groups, PHP dependent vs non-dependent. Also remove some tests that are racey from the layout tests run in these test cases.

BUG=54717
TEST=yes

Review URL: http://codereview.chromium.org/4858003

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@69085 0039d316-1c4b-4281-b951-d872f2087c98

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