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

ash/system/date/date_view.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_DATE_DATE_VIEW_H_
 #define ASH_SYSTEM_DATE_DATE_VIEW_H_
 
 #include "ash/system/date/tray_date.h"
 #include "ash/system/tray/actionable_view.h"
 #include "base/i18n/time_formatting.h"
-#include "base/timer.h"
+#include "base/timer/timer.h"
 #include "ui/views/view.h"
 
 namespace views {
 class Label;
 }
 
 namespace ash {
 namespace internal {
 namespace tray {
 
@@ skipping 96 matching lines @@
   base::HourClockType hour_type_;
 
   DISALLOW_COPY_AND_ASSIGN(TimeView);
 };
 
 }  // namespace tray
 }  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_SYSTEM_DATE_DATE_VIEW_H_