Use a direct include of time headers in content/, part 1.

content/browser/renderer_host/smooth_scroll_calculator.h

 // 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.
 
 #ifndef CONTENT_BROWSER_RENDERER_HOST_SMOOTH_SCROLL_CALCULATOR_H_
 #define CONTENT_BROWSER_RENDERER_HOST_SMOOTH_SCROLL_CALCULATOR_H_
 
-#include "base/time.h"
+#include "base/time/time.h"
 
 namespace content {
 
 // An utility class to calculate the delta for smooth scroll gesture
 // events.
 class SmoothScrollCalculator {
  public:
   SmoothScrollCalculator();
   ~SmoothScrollCalculator();
 
   double GetScrollDelta(base::TimeTicks now, base::TimeDelta desired_interval);
 
  private:
   base::TimeTicks last_tick_time_;
 
   DISALLOW_COPY_AND_ASSIGN(SmoothScrollCalculator);
 };
 
 } // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_SMOOTH_SCROLL_CALCULATOR_H_