Use unique_ptr for RenderLocationIndicatorImpl

src/mbgl/renderer/layers/render_location_indicator_layer.cpp

@@ -709,7 +709,7 @@ inline const LocationIndicatorLayer::Impl& impl(const Immutable<style::Layer::Im
 
 RenderLocationIndicatorLayer::RenderLocationIndicatorLayer(Immutable<style::LocationIndicatorLayer::Impl> _impl)
     : RenderLayer(makeMutable<LocationIndicatorLayerProperties>(std::move(_impl))),
-      renderImpl(new RenderLocationIndicatorImpl()),
+      renderImpl(std::make_unique<RenderLocationIndicatorImpl>()),
       unevaluated(impl(baseImpl).paint.untransitioned()) {
     assert(gfx::BackendScope::exists());
 }

src/mbgl/renderer/layers/render_location_indicator_layer.hpp

@@ -23,7 +23,7 @@ private:
     void render(PaintParameters &) override;
 
     bool contextDestroyed = false;
-    RenderLocationIndicatorImpl *renderImpl = nullptr;
+    std::unique_ptr<RenderLocationIndicatorImpl> renderImpl;
     style::LocationIndicatorPaintProperties::Unevaluated unevaluated;
 };