old_contents: from django.http import HttpRequest, HttpResponse
  from zerver.lib.response import json_success
  from zerver.lib.webhooks.common import check_send_webhook_message
  from zerver.decorator import REQ, has_request_variables, api_key_only_webhook_view
  from zerver.models import UserProfile
  
  @api_key_only_webhook_view('Dropbox')
  @has_request_variables
  def api_dropbox_webhook(request: HttpRequest, user_profile: UserProfile,
                          notify_bot_owner_on_invalid_json=False) -> HttpResponse:
      if request.method == 'GET':
          return HttpResponse(request.GET['challenge'])
      elif request.method == 'POST':
          topic = 'Dropbox'
          check_send_webhook_message(request, user_profile, topic,
                                     "File has been updated on Dropbox!")
          return json_success()
  
new_contents: from django.http import HttpRequest, HttpResponse
  from zerver.lib.response import json_success
  from zerver.lib.webhooks.common import check_send_webhook_message
  from zerver.decorator import REQ, has_request_variables, api_key_only_webhook_view
  from zerver.models import UserProfile
  
  @api_key_only_webhook_view('Dropbox', notify_bot_owner_on_invalid_json=False)
  @has_request_variables
  def api_dropbox_webhook(request: HttpRequest, user_profile: UserProfile) -> HttpResponse:
      if request.method == 'GET':
          return HttpResponse(request.GET['challenge'])
      elif request.method == 'POST':
          topic = 'Dropbox'
          check_send_webhook_message(request, user_profile, topic,
                                     "File has been updated on Dropbox!")
          return json_success()
  
subject: Fix incorrect placement of notify_bot_owner_on_invalid_json.