ui: Move software fallback decisions to GpuProcessTransportFactory.

ui/compositor/test/in_process_context_factory.h

Index: ui/compositor/test/in_process_context_factory.h
diff --git a/ui/compositor/test/in_process_context_factory.h b/ui/compositor/test/in_process_context_factory.h
index ee39719babe50434e2a37c241b99e513f0632930..6cf0a0fdde22edf6bef1ab258ce368e5db93b831 100644
--- a/ui/compositor/test/in_process_context_factory.h
+++ b/ui/compositor/test/in_process_context_factory.h
@@ -35,8 +35,7 @@ class InProcessContextFactory : public ContextFactory {
   }
 
   // ContextFactory implementation
-  void CreateOutputSurface(base::WeakPtr<Compositor> compositor,
-                           bool software_fallback) override;
+  void CreateOutputSurface(base::WeakPtr<Compositor> compositor) override;
 
   scoped_refptr<Reflector> CreateReflector(Compositor* mirrored_compositor,
                                            Layer* mirroring_layer) override;