wtf/dtoa/* uses a confusing name to reference its buffers
https://bugs.webkit.org/show_bug.cgi?id=109709

Reviewed by Darin Adler.

The data structure Vector in wtf/dtoa has nothing to do with a traditional
vector, is it just a pointer and the length of the pointed buffer.

Rename it to BufferReference to avoid mistakes.

* wtf/dtoa/bignum-dtoa.cc:
* wtf/dtoa/bignum-dtoa.h:
* wtf/dtoa/bignum.cc:
* wtf/dtoa/bignum.h:
(Bignum):
* wtf/dtoa/double-conversion.cc:
* wtf/dtoa/fast-dtoa.cc:
* wtf/dtoa/fast-dtoa.h:
* wtf/dtoa/fixed-dtoa.cc:
* wtf/dtoa/fixed-dtoa.h:
(double_conversion):
* wtf/dtoa/strtod.cc:
* wtf/dtoa/strtod.h:
(double_conversion):
* wtf/dtoa/utils.h:
(double_conversion):
(WTF::double_conversion::BufferReference::BufferReference):
(WTF::double_conversion::BufferReference::SubBufferReference):
(StringBuilder):


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@147976 268f45cc-cd09-0410-ab3c-d52691b4dbfc