Disable all the tests that are flaking more than 5% on ChromeOS builders.

chrome/browser/chromeos/policy/policy_cert_verifier_unittest.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/chromeos/policy/policy_cert_verifier.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/callback.h"
 #include "base/memory/ref_counted.h"
@@ skipping 158 matching lines @@
   ASSERT_EQ(net::ERR_IO_PENDING, error);
   EXPECT_TRUE(request_handle);
   error = callback.WaitForResult();
   EXPECT_EQ(net::OK, error);
 
   // The additional trust anchors were not used, since the certificate is
   // trusted from the database.
   EXPECT_FALSE(WasTrustAnchorUsedAndReset());
 }
 
-TEST_F(PolicyCertVerifierTest, VerifyUsingAdditionalTrustAnchor) {
+// http://crbug.com/396497
+TEST_F(PolicyCertVerifierTest, DISABLED_VerifyUsingAdditionalTrustAnchor) {
   ASSERT_TRUE(SupportsAdditionalTrustAnchors());
 
   // |test_server_cert_| is untrusted, so Verify() fails.
   {
     net::CertVerifyResult verify_result;
     net::TestCompletionCallback callback;
     net::CertVerifier::RequestHandle request_handle = NULL;
     int error = VerifyTestServerCert(callback, &verify_result, &request_handle);
     ASSERT_EQ(net::ERR_IO_PENDING, error);
     EXPECT_TRUE(request_handle);
@@ skipping 36 matching lines @@
     int error = VerifyTestServerCert(callback, &verify_result, &request_handle);
     // Note: this hits the cached result from the first Verify() in this test.
     EXPECT_EQ(net::ERR_CERT_AUTHORITY_INVALID, error);
   }
   // The additional trust anchors were reset, thus |cert_verifier_| should not
   // signal it's usage anymore.
   EXPECT_FALSE(WasTrustAnchorUsedAndReset());
 }
 
 }  // namespace policy