Revert of Partially convert geolocation IPC to Mojo.

Revert of Partially convert geolocation IPC to Mojo. (patchset #16 id:360001 of https://codereview.chromium.org/628773003/)

Reason for revert:
Made inspector/geolocation-emulation-tests.html layout test crash on all platforms

Flakiness dashboard link:
http://test-results.appspot.com/dashboards/flakiness_dashboard.html#showExpectations=true&tests=inspector%2Fgeolocation-emulation-tests.html

Chromium revisions range:
https://chromium.googlesource.com/chromium/src/+log/a772ed62ff0641df984feffe977b1545e94d53f1..5a5999ebee2d83c5a8dc72b3c6035fd803fdf90d?pretty=fuller

Original issue's description:
> Partially convert geolocation IPC to Mojo.
>
> This CL converts the non-permissions-related geolocation IPC to Mojo. The Mojo
> GeolocationService interface allows clients to observe location updates. In
> //content, the service and its client connect on a per-frame basis, eliminating
> the need for the tracking of multiple frames that GeolocationDispatcherHost had
> previously been doing. To handle the fact that geolocation updates can be
> paused and resumed at per-WebContents granularity, we introduce a
> GeolocationServiceContext class, which is used to scope the granularity of
> pauses and resumes.
>
> Currently, GeolocationDispatcherHost still handles permissions-related
> geolocation IPC. This IPC will be moved to Mojo once there is resolution on
> what the right model for handling permissions there is.
>
> BUG=420497
> TEST=Go to maps.google.com, allow location tracking, and check that your
> location is correctly pinpointed on the map.
>
> Committed: https://crrev.com/28e88081438dc08b06d5f05cfdd980c407db1638
> Cr-Commit-Position: refs/heads/master@{#301604}

TBR=qsr@chromium.org,mvanouwerkerk@chromium.org,timvolodine@chromium.org,brettw@chromium.org,creis@chromium.org,tsepez@chromium.org,aa@chromium.org,blundell@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=420497
Committed: https://crrev.com/f9b12ff57fc7491e9ccaa6db69c893307bd1fee1
Cr-Commit-Position: refs/heads/master@{#301629}

[yurys, 2014-10-28 13:26:08]

Created Revert of Partially convert geolocation IPC to Mojo.

[commit-bot: I haz the power, 2014-10-28 13:27:01]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/680323002/1

[commit-bot: I haz the power, 2014-10-28 13:27:49]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-10-28 13:28:31]

Patchset 1 (id:??) landed as
https://crrev.com/f9b12ff57fc7491e9ccaa6db69c893307bd1fee1
Cr-Commit-Position: refs/heads/master@{#301629}

[blundell, 2014-10-28 15:06:15]

lgtm

d'oh! I even ran a bunch of geolocation layout tests locally, but didn't see
this one.