Properly recycle uniform buffers in vulkan

src/gpu/vk/GrVkUniformBuffer.h

Index: src/gpu/vk/GrVkUniformBuffer.h
diff --git a/src/gpu/vk/GrVkUniformBuffer.h b/src/gpu/vk/GrVkUniformBuffer.h
index 7aa3af6f8d489c87259af6697b0e16eadc92bf2f..d2d9f3230c4c93cfd83f171e5c734edfb464221a 100644
--- a/src/gpu/vk/GrVkUniformBuffer.h
+++ b/src/gpu/vk/GrVkUniformBuffer.h
@@ -45,6 +45,9 @@ private:
         typedef GrVkBuffer::Resource INHERITED;
     };
 
+    const GrVkBuffer::Resource* createResource(GrVkGpu* gpu,
+                                               const GrVkBuffer::Desc& descriptor) override;
+
     GrVkUniformBuffer(GrVkGpu* gpu, const GrVkBuffer::Desc& desc,
                       const GrVkUniformBuffer::Resource* resource)
         : INHERITED(desc, resource)