tree edbe35a08abbbc97981b9147e24e37fa17205397
parent 5d602762544813b41a2ff0afadd4d9266382e4fd
author bnc <bnc@google.com> 1616694882 -0700
committer Copybara-Service <copybara-worker@google.com> 1616694943 -0700

Resize HttpDecoder::buffer_ when buffering data.

Before this change, HttpDecoder::buffer_ was always empty.  A
std::string::reserve() call made sure its storage was large enough, and that
memory was address directly, always beyond the size of the string object.

After this CL, the size of buffer_ reflects the amount of buffered bytes, and
memory beyond its size is never addressed.  The reserve() call is preserved to
avoid reallocation and copy as the buffer grows.

PiperOrigin-RevId: 365076891
Change-Id: If58949fd10fe1741416dab4691faa5c3e728ad8e