Fix gn check errors for storage/common:common

Fix gn check errors for storage/common:common

Once blink headers are added as sources (https://codereview.chromium.org/1222673004/), if you run the following
command line, you will get errors like this:

$ gn check
ERROR at //storage/common/fileapi/file_system_util.h:17:11: Include not allowed.
          ^------------------------------------------------
It is not in any dependency of
  //storage/common:common
The include file is in the target(s):
  //third_party/WebKit/public:blink_headers
which should somehow be reachable.

BUG=367595

Review URL: https://codereview.chromium.org/1222733002

Cr-Commit-Position: refs/heads/master@{#337904}