Warn on missing OVERRIDE/virtual everywhere, not just in header files.

net/quic/congestion_control/inter_arrival_state_machine_test.cc

 // Copyright (c) 2013 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 "base/basictypes.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "net/quic/congestion_control/inter_arrival_state_machine.h"
 #include "net/quic/test_tools/mock_clock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace net {
 namespace test {
 
 class InterArrivalStateMachineTest : public ::testing::Test {
  protected:
   InterArrivalStateMachineTest() {
   }
 
-  void SetUp() {
+  virtual void SetUp() {
     state_machine_.reset(new InterArrivalStateMachine(&clock_));
   }
 
   MockClock clock_;
   scoped_ptr<InterArrivalStateMachine> state_machine_;
 };
 
 TEST_F(InterArrivalStateMachineTest, SimplePacketLoss) {
   QuicTime::Delta rtt = QuicTime::Delta::FromMilliseconds(100);
   state_machine_->set_rtt(rtt);
@@ skipping 86 matching lines @@
   // Make sure we stay in state competing TCP flow(s).
   clock_.AdvanceTime(rtt);
   state_machine_->PacketLossEvent();
   state_machine_->DecreaseBitrateDecision();
   EXPECT_EQ(kInterArrivalStateCompetingTcpFLow,
             state_machine_->GetInterArrivalState());
 }
 
 }  // namespace test
 }  // namespace net