Removed obsolete float_util.h as VS2013 supports standards well enough.

cc/base/histograms.cc

 // Copyright 2015 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.
 
 #include "cc/base/histograms.h"
 
 #include <algorithm>
+#include <cmath>
 #include <limits>
 
-#include "base/float_util.h"
 #include "base/numerics/safe_conversions.h"
 
 namespace cc {
 
 // Minimum elapsed time of 1us to limit weighting of fast calls.
 static const int64 kMinimumTimeMicroseconds = 1;
 
 ScopedUMAHistogramAreaTimerBase::ScopedUMAHistogramAreaTimerBase() : area_(0) {
 }
 
@@ skipping 10 matching lines @@
 
 // static
 void ScopedUMAHistogramAreaTimerBase::GetHistogramValues(
     base::TimeDelta elapsed,
     int area,
     Sample* time_microseconds,
     Sample* pixels_per_ms) {
   elapsed = std::max(
       elapsed, base::TimeDelta::FromMicroseconds(kMinimumTimeMicroseconds));
   double area_per_time = area / elapsed.InMillisecondsF();
-  DCHECK(!base::IsNaN(area_per_time));
+  DCHECK(!std::isnan(area_per_time));
   *time_microseconds = base::saturated_cast<Sample>(elapsed.InMicroseconds());
   *pixels_per_ms = base::saturated_cast<Sample>(area_per_time);
 }
 
 }  // namespace cc