Merge 106672 - REGRESSION (r105401-105403): Blue flash on css border transition

Source/WebCore/platform/animation/AnimationUtilities.h

Index: Source/WebCore/platform/animation/AnimationUtilities.h
===================================================================
--- Source/WebCore/platform/animation/AnimationUtilities.h	(revision 106716)
+++ Source/WebCore/platform/animation/AnimationUtilities.h	(working copy)
@@ -37,7 +37,7 @@
 
 inline unsigned blend(unsigned from, unsigned to, double progress)
 {
-    return static_cast<unsigned>(lround(static_cast<double>(from) + static_cast<double>(to - from) * progress));
+    return static_cast<unsigned>(lround(to > from ? static_cast<double>(from) + static_cast<double>(to - from) * progress : static_cast<double>(from) - static_cast<double>(from - to) * progress));
 }
 
 inline double blend(double from, double to, double progress)