Add BIO_write return value to crash dumps.

This'll help figure out what they were if they're not equal.

BUG=335557

Review URL: https://codereview.chromium.org/143823014

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@246459 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 246459