Remove unneeded stringprintf.h usage in chrome/ and net/

CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.win:win10_chromium_x64_rel_ng
TBR=dbeam@chromium.org,bajones@chromium.org

Review-Url: https://codereview.chromium.org/2511683002
Cr-Commit-Position: refs/heads/master@{#433401}
150 files changed