Move DOMActivityLogger and associated code from //chrome to //extensions

This is a follow-up to rockot's CL to move extensions::Dispatcher and a
precondition to moving c/r/e/extension_helper.cc.

This was entirely a mechanical move -- no functional changes.

BUG=359836
TEST=compiles

Review URL: https://codereview.chromium.org/268553002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@267502 0039d316-1c4b-4281-b951-d872f2087c98
23 files changed