[GTK] Remove build time dependency on Geoclue2

[GTK] Remove build time dependency on Geoclue2
https://bugs.webkit.org/show_bug.cgi?id=195994

Reviewed by Michael Catanzaro.

.:

Remove USE_GEOCLUE build option.

* Source/cmake/FindGeoClue2.cmake: Removed.
* Source/cmake/OptionsGTK.cmake:

Source/WebCore:

Remove old Geoclue implementation.

* PlatformGTK.cmake:
* SourcesGTK.txt:
* platform/geoclue/GeolocationProviderGeoclue.cpp: Removed.
* platform/geoclue/GeolocationProviderGeoclue.h: Removed.
* platform/geoclue/GeolocationProviderGeoclueClient.h: Removed.

Source/WebCore/platform/gtk/po:

* POTFILES.in: Add GeoclueGeolocationProvider.cpp.

Source/WebKit:

Add GeoclueGeolocationProvider class to provide geolocation position updates using Geoclue2 DBus service.

* PlatformGTK.cmake:
* PlatformWPE.cmake:
* SourcesGTK.txt:
* SourcesWPE.txt:
* UIProcess/API/glib/WebKitGeolocationManager.cpp:
(_WebKitGeolocationPosition::_WebKitGeolocationPosition):
(webkitGeolocationManagerStop):
(webkitGeolocationManagerSetEnableHighAccuracy):
(webkitGeolocationManagerDispose):
(webkit_geolocation_manager_class_init):
* UIProcess/geoclue/GeoclueGeolocationProvider.cpp: Added.
(WebKit::GeoclueGeolocationProvider::GeoclueGeolocationProvider):
(WebKit::GeoclueGeolocationProvider::~GeoclueGeolocationProvider):
(WebKit::GeoclueGeolocationProvider::start):
(WebKit::GeoclueGeolocationProvider::stop):
(WebKit::GeoclueGeolocationProvider::setEnableHighAccuracy):
(WebKit::GeoclueGeolocationProvider::destroyManagerLater):
(WebKit::GeoclueGeolocationProvider::destroyManager):
(WebKit::GeoclueGeolocationProvider::setupManager):
(WebKit::GeoclueGeolocationProvider::createClient):
(WebKit::GeoclueGeolocationProvider::setupClient):
(WebKit::GeoclueGeolocationProvider::startClient):
(WebKit::GeoclueGeolocationProvider::stopClient):
(WebKit::GeoclueGeolocationProvider::requestAccuracyLevel):
(WebKit::GeoclueGeolocationProvider::clientLocationUpdatedCallback):
(WebKit::GeoclueGeolocationProvider::createLocation):
(WebKit::GeoclueGeolocationProvider::locationUpdated):
(WebKit::GeoclueGeolocationProvider::didFail):
* UIProcess/geoclue/GeoclueGeolocationProvider.h: Added.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@243409 268f45cc-cd09-0410-ab3c-d52691b4dbfc