Move base to DEPS

base/time/clock.h

-// Copyright (c) 2012 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.
-
-#ifndef BASE_TIME_CLOCK_H_
-#define BASE_TIME_CLOCK_H_
-
-#include "base/base_export.h"
-#include "base/time/time.h"
-
-namespace base {
-
-// A Clock is an interface for objects that vend Times.  It is
-// intended to be able to test the behavior of classes with respect to
-// time.
-//
-// See DefaultClock (base/time/default_clock.h) for the default
-// implementation that simply uses Time::Now().
-//
-// (An implementation that uses Time::SystemTime() should be added as
-// needed.)
-//
-// See SimpleTestClock (base/test/simple_test_clock.h) for a simple
-// test implementation.
-//
-// See TickClock (base/time/tick_clock.h) for the equivalent interface for
-// TimeTicks.
-class BASE_EXPORT Clock {
- public:
-  virtual ~Clock();
-
-  // Now() must be safe to call from any thread.  The caller cannot
-  // make any ordering assumptions about the returned Time.  For
-  // example, the system clock may change to an earlier time.
-  virtual Time Now() = 0;
-};
-
-}  // namespace base
-
-#endif  // BASE_TIME_CLOCK_H_