Add PRESUBMIT check for test expectations matching "^FAIL".

I don't want to accidentally submit failing test expectation files for
review. This CL might prevent me from accidentally doing that, as it will
prompt at upload-time if a file in LayoutTests matches that string.

Review URL: https://chromiumcodereview.appspot.com/23658061

git-svn-id: svn://svn.chromium.org/blink/trunk@158264 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Remove unused overload from ArrayBufferAllocator.

R=jochen@chromium.org

Review URL: https://chromiumcodereview.appspot.com/23694051

git-svn-id: svn://svn.chromium.org/blink/trunk@158265 bbb929c8-8fbe-4397-9dbb-9b2b20218538