Ignore rounding error between clip_layer_length_ and scroll_layer_length_

cc/base/math_util.cc

 // Copyright 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 "cc/base/math_util.h"
 
 #include <algorithm>
 #include <cmath>
 #include <limits>
 #ifdef __SSE__
@@ skipping 799 matching lines @@
   _mm_setcsr(orig_state_ | 0x8040);
 #endif
 }
 
 ScopedSubnormalFloatDisabler::~ScopedSubnormalFloatDisabler() {
 #ifdef __SSE__
   _mm_setcsr(orig_state_);
 #endif
 }
 
+bool MathUtil::IsFloatNearlyTheSame(float left, float right) {

[enne (OOO), 2017/04/21 22:54:33]

I'm not sure we need both IsFloatNearlyTheSame and IsNearlyTheSameForTesting and
IsNearlyTheSame.  I think maybe just call this IsFloatNearlyTheSame or expose
IsNearlyTheSame?

+  return IsNearlyTheSame(left, right);
+}
+
 bool MathUtil::IsNearlyTheSameForTesting(float left, float right) {
   return IsNearlyTheSame(left, right);
 }
 
 bool MathUtil::IsNearlyTheSameForTesting(const gfx::PointF& left,
                                          const gfx::PointF& right) {
   return IsNearlyTheSame(left, right);
 }
 
 bool MathUtil::IsNearlyTheSameForTesting(const gfx::Point3F& left,
                                          const gfx::Point3F& right) {
   return IsNearlyTheSame(left, right);
 }
 
 }  // namespace cc