Index: qt5webkit/Source/WTF/wtf/MathExtras.h
===================================================================
--- qt5webkit.orig/Source/WTF/wtf/MathExtras.h
+++ qt5webkit/Source/WTF/wtf/MathExtras.h
@@ -75,24 +75,6 @@ const double sqrtOfTwoDouble = M_SQRT2;
 const float sqrtOfTwoFloat = static_cast<float>(M_SQRT2);
 #endif
 
-#if OS(SOLARIS)
-
-namespace std {
-
-#ifndef isfinite
-inline bool isfinite(double x) { return finite(x) && !isnand(x); }
-#endif
-#ifndef signbit
-inline bool signbit(double x) { return copysign(1.0, x) < 0; }
-#endif
-#ifndef isinf
-inline bool isinf(double x) { return !finite(x) && !isnand(x); }
-#endif
-
-} // namespace std
-
-#endif
-
 #if COMPILER(MSVC)
 
 // Work around a bug in Win, where atan2(+-infinity, +-infinity) yields NaN instead of specific values.