Move PasswordStore and friends into the password_manager component.

Moves the following into the PasswordManager component:
- PasswordStoreConsumer
- PasswordStoreChange
- PasswordStore
- PasswordStoreDefault
- TestPasswordStore

Other than elimination of stale includes, no refactorings were required to
perform these moves.  MockPasswordStore is left for followup work as some
refactoring is still required there.

BUG=334656,334657,334658,334659,334664
TBR=thakis

Review URL: https://codereview.chromium.org/139443003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@249675 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 249675