Add GetSurfaceManager to ui::ContextFactory.

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 d8fca980608ded0fc94845b6fd2922738cf2c36c..02f36837515ab38d7a8722d810a2d44ab68d01a2 100644
--- a/ui/compositor/test/in_process_context_factory.h
+++ b/ui/compositor/test/in_process_context_factory.h
@@ -56,6 +56,7 @@ class InProcessContextFactory : public ContextFactory {
   gpu::GpuMemoryBufferManager* GetGpuMemoryBufferManager() override;
   cc::TaskGraphRunner* GetTaskGraphRunner() override;
   std::unique_ptr<cc::SurfaceIdAllocator> CreateSurfaceIdAllocator() override;
+  cc::SurfaceManager* GetSurfaceManager() override;
   void ResizeDisplay(ui::Compositor* compositor,
                      const gfx::Size& size) override;