Quota: Rename StorageQuota and StorageInfo

This is a preparation patch for introducing new Quota Management API
behind a flag.

Some components of the new API will cause name conflicts with ones of
the current version. To avoid it, this renames existing components
(adding "Deprecated" prefix to them).

We think this change won't affect existing applications because there
is no functional change and generally those names aren't used directly.


BUG=332325
TEST=run_webkit_tests.sh storage/\*

Review URL: https://codereview.chromium.org/131743015

git-svn-id: svn://svn.chromium.org/blink/trunk@165429 bbb929c8-8fbe-4397-9dbb-9b2b20218538