Quota: Remove self-destructive callbacks for cleanup (Blink)

1) Renames following files:
WebStorageQuotaCallbacks => StorageQuotaCallbacks
WebStorageQuotaCallbacksImpl => DeprecatedStorageQuotaCallbacksImpl 
DeprecatedWebStorageQuotaCallbacksImpl => DeprecatedStorageQuotaCallbacksImpl

2) Adds new WebStorageQuotaCallbacks and WebStorageQuotaCallbacksPrivate which
manages StorageQuotaCallbacks

Depends on Chromium-side change: https://codereview.chromium.org/132333016/


BUG=338995
TEST=should pass all existing tests (run with chromium-side patch)

Review URL: https://codereview.chromium.org/135723009

git-svn-id: svn://svn.chromium.org/blink/trunk@166465 bbb929c8-8fbe-4397-9dbb-9b2b20218538