Move Source/WTF/wtf to Source/wtf

Source/wtf/dtoa/cached-powers.cc

 // Copyright 2006-2008 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 173 matching lines @@
         CachedPower cached_power = kCachedPowers[index];
         *power = DiyFp(cached_power.significand, cached_power.binary_exponent);
         *found_exponent = cached_power.decimal_exponent;
         ASSERT(*found_exponent <= requested_exponent);
         ASSERT(requested_exponent < *found_exponent + kDecimalExponentDistance);
     }
     
 }  // namespace double_conversion
 
 } // namespace WTF