MockQC stops create its own RP and MockOcclusionTracker

cc/trees/layer_tree_host_pixeltest_on_demand_raster.cc

Index: cc/trees/layer_tree_host_pixeltest_on_demand_raster.cc
diff --git a/cc/trees/layer_tree_host_pixeltest_on_demand_raster.cc b/cc/trees/layer_tree_host_pixeltest_on_demand_raster.cc
index 5bc2f318a906df48f45b91d8d61bbb003bef7873..0d31709f289c4bb7df80214d370f3c861ed0c583 100644
--- a/cc/trees/layer_tree_host_pixeltest_on_demand_raster.cc
+++ b/cc/trees/layer_tree_host_pixeltest_on_demand_raster.cc
@@ -41,8 +41,9 @@ class LayerTreeHostOnDemandRasterPixelTest : public LayerTreePixelTest {
     PictureLayerImpl* picture_layer = static_cast<PictureLayerImpl*>(
         host_impl->active_tree()->root_layer()->child_at(0));
 
+    MockOcclusionTracker<LayerImpl> occlusion_tracker;
     scoped_ptr<RenderPass> render_pass = RenderPass::Create();
-    MockQuadCuller quad_culler(render_pass.get());
+    MockQuadCuller quad_culler(render_pass.get(), &occlusion_tracker);
 
     AppendQuadsData data;
     picture_layer->AppendQuads(&quad_culler, &data);