Always mark content downloaded by devtools delegate as potentially dangerous

Bug: 805445
Change-Id: I7051f519205e178db57e23320ab979f8fa9ce38b
Reviewed-on: https://chromium-review.googlesource.com/894782
Commit-Queue: David Vallet <dvallet@chromium.org>
Reviewed-by: Pavel Feldman <pfeldman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#533215}
void DevToolsDownloadManagerDelegate::GetNextId(
    const content::DownloadIdCallback& callback) {
  static uint32_t next_id = content::DownloadItem::kInvalidId + 1;
  if (proxy_download_delegate_) {
    proxy_download_delegate_->GetNextId(callback);
    return;
  }
  callback.Run(next_id++);
}

void DevToolsDownloadManagerDelegate::GetNextId(
    const content::DownloadIdCallback& callback) {
  static uint32_t next_id = content::DownloadItem::kInvalidId + 1;
  if (proxy_download_delegate_) {
    proxy_download_delegate_->GetNextId(callback);
    return;
  }
  callback.Run(next_id++);
}
