replace COMPILE_ASSERT with static assert in wtf/

Source/wtf/dtoa/utils.h

 // Copyright 2010 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 270 matching lines @@
     // There is an additional use for BitCast.
     // Recent gccs will warn when they see casts that may result in breakage due to
     // the type-based aliasing rule.  If you have checked that there is no breakage
     // you can use BitCast to cast one pointer type to another.  This confuses gcc
     // enough that it can no longer see that you have cast one pointer type to
     // another thus avoiding the warning.
     template <class Dest, class Source>
     inline Dest BitCast(const Source& source) {
         // Compile time assertion: sizeof(Dest) == sizeof(Source)
         // A compile error here means your Dest and Source have different sizes.
-        COMPILE_ASSERT(sizeof(Dest) == sizeof(Source), VerifySizesAreEqual);
+        static_assert(sizeof(Dest) == sizeof(Source), "Verify sizes are equal");

[Nico, 2014/12/16 17:56:28]

"sizes should be equal" would be more similar to the other messages

[Mostyn Bramley-Moore, 2014/12/16 19:00:37]

Done.

 
         Dest dest;
         memcpy(&dest, &source, sizeof(dest));
         return dest;
     }
 
     template <class Dest, class Source>
     inline Dest BitCast(Source* source) {
         return BitCast<Dest>(reinterpret_cast<uintptr_t>(source));
     }
 
 }  // namespace double_conversion
 
 } // namespace WTF
 
 #endif  // DOUBLE_CONVERSION_UTILS_H_