GitLab

The parameter |factory| of HttpAuthHandlerRegistryFactory::
RegisterSchemeFactory() maybe nullptr, move all usage of |factory|
in the check, make sure it will not crash.

Change-Id: Ic48b8e798bf26229436ccd2357a5c1a0dec789d7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2333912Reviewed-by: Zhongyi Shi <zhongyi@chromium.org>
Commit-Queue: Zhongyi Shi <zhongyi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#794893}