Use a direct include of time headers in android_webview/, apps/, ash/.

ash/system/session_length_limit/tray_session_length_limit.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 ASH_SYSTEM_SESSION_LENGTH_LIMIT_TRAY_SESSION_LENGTH_LIMIT_H_
 #define ASH_SYSTEM_SESSION_LENGTH_LIMIT_TRAY_SESSION_LENGTH_LIMIT_H_
 
 #include "ash/system/session_length_limit/session_length_limit_observer.h"
 #include "ash/system/tray/system_tray_item.h"
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
-#include "base/time.h"
-#include "base/timer.h"
+#include "base/time/time.h"
+#include "base/timer/timer.h"
 
 namespace ash {
 namespace internal {
 
 namespace tray {
 class RemainingSessionTimeNotificationView;
 class RemainingSessionTimeTrayView;
 }
 
 // Adds a countdown timer to the system tray if the session length is limited.
@@ skipping 38 matching lines @@
   base::TimeDelta remaining_session_time_;
   scoped_ptr<base::RepeatingTimer<TraySessionLengthLimit> > timer_;
 
   DISALLOW_COPY_AND_ASSIGN(TraySessionLengthLimit);
 };
 
 }  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_SYSTEM_SESSION_LENGTH_LIMIT_TRAY_SESSION_LENGTH_LIMIT_H_