Blink Animation: Limit maximum accuracy to avoid hanging for long durations.

ui/gfx/geometry/cubic_bezier.h

 // Copyright 2014 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 UI_GFX_GEOMETRY_CUBIC_BEZIER_H_
 #define UI_GFX_GEOMETRY_CUBIC_BEZIER_H_
 
 #include "base/macros.h"
 #include "ui/gfx/gfx_export.h"
 
@@ skipping 14 matching lines @@
   }
 
   double SampleCurveDerivativeX(double t) const {
     return (3.0 * ax_ * t + 2.0 * bx_) * t + cx_;
   }
 
   double SampleCurveDerivativeY(double t) const {
     return (3.0 * ay_ * t + 2.0 * by_) * t + cy_;
   }
 
+  static double GetDefaultEpsilon();
+
   // Given an x value, find a parametric value it came from.
   // x must be in [0, 1] range. Doesn't use gradients.
   double SolveCurveX(double x, double epsilon) const;
 
   // Evaluates y at the given x with default epsilon.
   double Solve(double x) const;
   // Evaluates y at the given x. The epsilon parameter provides a hint as to the
   // required accuracy and is not guaranteed. Uses gradients if x is
   // out of [0, 1] range.
   double SolveWithEpsilon(double x, double epsilon) const {
@@ skipping 40 matching lines @@
 
   double range_min_;
   double range_max_;
 
   DISALLOW_ASSIGN(CubicBezier);
 };
 
 }  // namespace gfx
 
 #endif  // UI_GFX_GEOMETRY_CUBIC_BEZIER_H_