[core] Make the BackgroundScheduler a singleton

- Do not carry it over everywhere as parameter, it is a shared
  instance anyway and the lifecycle is pretty much the app lifecycle
  from the moment we instantiate a map.
- Rename to BackgroundScheduler because it is a Scheduler that will
  do tasks in the background, we don't make assumptions if it is a
  thread pool or a single thread.
- Most importantly, remove the dependency from `core` on `platform`.

1 files changed, 1 insertions, 2 deletions

diff --git a/platform/qt/src/qmapboxgl_map_renderer.hpp b/platform/qt/src/qmapboxgl_map_renderer.hpp
index a59cf74997..e6f25c85d1 100644
--- a/platform/qt/src/qmapboxgl_map_renderer.hpp
+++ b/platform/qt/src/qmapboxgl_map_renderer.hpp
@@ -7,7 +7,6 @@
 #include <mbgl/renderer/renderer_backend.hpp>
 #include <mbgl/renderer/renderer_observer.hpp>
 #include <mbgl/storage/default_file_source.hpp>
-#include <mbgl/util/shared_thread_pool.hpp>
 #include <mbgl/util/util.hpp>
 
 #include <QtGlobal>
@@ -28,7 +27,7 @@ class QMapboxGLMapRenderer : public QObject
 
 public:
     QMapboxGLMapRenderer(qreal pixelRatio, mbgl::DefaultFileSource &,
-            mbgl::ThreadPool &, QMapboxGLSettings::GLContextMode,
+            QMapboxGLSettings::GLContextMode,
             const QString &localFontFamily);
     virtual ~QMapboxGLMapRenderer();