DevTools: Remove InjectedScriptHost.databaseId and .storageId

databaseId is required to implement "inspect(database)" in Console. This is a very seldom used feature and its current implementation breaks dependency order between "modules" and "core". Removing this feature (as well as storageId which work in a similar way). Might consider re-implementing it in the frontend if anyone misses it.

BUG=340221

Review URL: https://codereview.chromium.org/136393008

git-svn-id: svn://svn.chromium.org/blink/trunk@166406 bbb929c8-8fbe-4397-9dbb-9b2b20218538