Remove logging.h from cc files that don't use it.

base/watchdog_unittest.cc

 // Copyright (c) 2006-2008 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.
 
 // Tests for Watchdog class.
 
-#include "base/logging.h"
 #include "base/platform_thread.h"
 #include "base/spin_wait.h"
 #include "base/time.h"
 #include "base/watchdog.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using base::TimeDelta;
 
 namespace {
 
@@ skipping 91 matching lines @@
   // Set a time greater than the timeout into the past.
   watchdog.ArmSomeTimeDeltaAgo(TimeDelta::FromSeconds(2));
   // It should almost instantly go off, but certainly in less than 5 minutes.
   SPIN_FOR_TIMEDELTA_OR_UNTIL_TRUE(TimeDelta::FromMinutes(5),
                                    watchdog.alarm_counter() > 0);
 
   EXPECT_EQ(1, watchdog.alarm_counter());
 }
 
 }  // namespace