[SyncFS] Add ListChangesTask



R=kinuko, nhiroki
BUG=240165

Review URL: https://codereview.chromium.org/26197004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@230677 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 230677
Identity API: remove email address from AccountInfo

We're not ready to ship email address reporting in the
onSignInStateChanged event. This change temporarily removes the
identity.email permission, and also the IdentityEventRouter, whose
purpose was to filter the email address out of AccountInfo for apps
that did not have the permission.

BUG=305830

Review URL: https://codereview.chromium.org/38573002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@230678 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 230678