Mojo: Unify the disparate source and header files into 3
- service.h, service.cc, service_internal.h
BUG=None
TEST=None (coming soon)
R=darin@chromium.org, darin

Review URL: https://codereview.chromium.org/65933002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@233915 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 233915
Telemetry: split out multi_tab pageset.

Follow up from https://codereview.chromium.org/23702038/,
split the pageset from the measurement.

BUG=

Review URL: https://codereview.chromium.org/23441059

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@233916 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 233916