Remove windows/mac/ios specific code from //ui

ui/gfx/animation/tween.cc

 // 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.
 
 #include "ui/gfx/animation/tween.h"
 
 #include <math.h>
 
-#if defined(OS_WIN)
-#include <float.h>
-#endif
-
 #include <algorithm>
 
 #include "base/basictypes.h"
 #include "base/logging.h"
 #include "ui/gfx/geometry/cubic_bezier.h"
 #include "ui/gfx/safe_integer_conversions.h"
 
 namespace gfx {
 
 // static
@@ skipping 110 matching lines @@
 
 // static
 int Tween::IntValueBetween(double value, int start, int target) {
   if (start == target)
     return start;
   double delta = static_cast<double>(target - start);
   if (delta < 0)
     delta--;
   else
     delta++;
-#if defined(OS_WIN)
-  return start + static_cast<int>(value * _nextafter(delta, 0));
-#else
   return start + static_cast<int>(value * nextafter(delta, 0));
-#endif
 }
 
 //static
 int Tween::LinearIntValueBetween(double value, int start, int target) {
   return std::floor(0.5 + DoubleValueBetween(value, start, target));
 }
 
 // static
 gfx::Rect Tween::RectValueBetween(double value,
                                   const gfx::Rect& start_bounds,
@@ skipping 16 matching lines @@
   if (value <= 0.0)
     return start_transform;
 
   gfx::Transform to_return = end_transform;
   to_return.Blend(start_transform, value);
 
   return to_return;
 }
 
 }  // namespace gfx