Initialize RendererSettings in ContextFactory

ui/aura/mus/mus_context_factory.h

Index: ui/aura/mus/mus_context_factory.h
diff --git a/ui/aura/mus/mus_context_factory.h b/ui/aura/mus/mus_context_factory.h
index 11b2065e90fad78626094050fc10714f776a5cfd..bd85bcba730a30eacbad682052f4fadfad7d275f 100644
--- a/ui/aura/mus/mus_context_factory.h
+++ b/ui/aura/mus/mus_context_factory.h
@@ -10,6 +10,7 @@
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
+#include "cc/output/renderer_settings.h"
 #include "cc/surfaces/surface_manager.h"
 #include "services/ui/public/cpp/raster_thread_helper.h"
 #include "services/ui/public/interfaces/window_tree.mojom.h"
@@ -47,15 +48,15 @@ class AURA_EXPORT MusContextFactory : public ui::ContextFactory {
   scoped_refptr<cc::ContextProvider> SharedMainThreadContextProvider() override;
   void RemoveCompositor(ui::Compositor* compositor) override;
   double GetRefreshRate() const override;
-  uint32_t GetImageTextureTarget(gfx::BufferFormat format,
-                                 gfx::BufferUsage usage) override;
   gpu::GpuMemoryBufferManager* GetGpuMemoryBufferManager() override;
   cc::TaskGraphRunner* GetTaskGraphRunner() override;
+  const cc::RendererSettings& GetRendererSettings() const override;
   void AddObserver(ui::ContextFactoryObserver* observer) override {}
   void RemoveObserver(ui::ContextFactoryObserver* observer) override {}
 
   ui::RasterThreadHelper raster_thread_helper_;
   ui::Gpu* gpu_;
+  cc::RendererSettings renderer_settings_;
   base::WeakPtrFactory<MusContextFactory> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(MusContextFactory);