Disable performance_browser_tests on Win 7 and Win 7 ATI.
Disable performance_browser_tests on Win 7 and Win 7 ATI.

TBR=eakuefner@chromium.org
BUG=582987

Review URL: https://codereview.chromium.org/1658743002

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#372716}

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