WebKit gardening. Disable a test which started to fail on Linux perf.

ShutdownTest.SimpleWindowClose

BUG=136644
TEST=
TBR=ananta

Review URL: https://chromiumcodereview.appspot.com/10703136

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@146030 0039d316-1c4b-4281-b951-d872f2087c98

chrome/test/perf/shutdown_test.cc

@@ -118,7 +118,7 @@ class ShutdownTest : public UIPerfTest {
   }
 };
 
-TEST_F(ShutdownTest, SimpleWindowClose) {
+TEST_F(ShutdownTest, DISABLED_SimpleWindowClose) {
   RunShutdownTest("shutdown", "simple-window-close",
                   true, /* important */ SIMPLE, ProxyLauncher::WINDOW_CLOSE);
 }