[DevTools] Guard DOM.setFileInputFiles under MayAffectLocalFiles

Bug: 805557
Change-Id: Ib6f37ec6e1d091ee54621cc0c5c44f1a6beab10f
Reviewed-on: https://chromium-review.googlesource.com/c/1334847
Reviewed-by: Pavel Feldman <pfeldman@chromium.org>
Commit-Queue: Dmitry Gozman <dgozman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#607902}
DOMHandler::DOMHandler()
DOMHandler::DOMHandler(bool allow_file_access)
     : DevToolsDomainHandler(DOM::Metainfo::domainName),

DOMHandler::DOMHandler()
     : DevToolsDomainHandler(DOM::Metainfo::domainName),
      host_(nullptr) {
}
