Revert 60362 - Downloads: Don't create the default download directory on startup.
Revert 60362 - Downloads: Don't create the default download directory on startup.

The change has been committed without "LGTM" from all reviewers.

BUG=56021
TEST=see bug.
Review URL: http://codereview.chromium.org/3386024

TBR=thestig@chromium.org
Review URL: http://codereview.chromium.org/3462010

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@60434 0039d316-1c4b-4281-b951-d872f2087c98

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