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

third_party/WebKit/Source/platform/animation/AnimationUtilities.h

 /*
  * Copyright (C) 2011 Apple Inc.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 12 matching lines @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef AnimationUtilities_h
 #define AnimationUtilities_h
 
 #include "platform/LayoutUnit.h"
 #include "platform/PlatformExport.h"
 #include "platform/geometry/FloatPoint.h"
 #include "platform/geometry/IntPoint.h"
+#include "ui/gfx/geometry/cubic_bezier.h"
 #include "wtf/MathExtras.h"
 
+#include <algorithm>
 #include <type_traits>
 
 namespace blink {
 
 inline int blend(int from, int to, double progress)
 {
     return lround(from + (to - from) * progress);
 }
 
 // For unsigned types.
@@ skipping 25 matching lines @@
 }
 
 inline FloatPoint blend(const FloatPoint& from, const FloatPoint& to, double progress)
 {
     return FloatPoint(blend(from.x(), to.x(), progress), blend(from.y(), to.y(), progress));
 }
 
 // Calculates the accuracy for evaluating a timing function for an animation with the specified duration.
 inline double accuracyForDuration(double duration)
 {
-    return 1.0 / (200.0 * duration);
+    return std::max(1.0 / (200.0 * duration), gfx::CubicBezier::GetDefaultEpsilon());
 }
 
 } // namespace blink
 
 #endif // AnimationUtilities_h