ScriptableRenderPipeline/Assets/LowEndMobilePipeline/Editor/LowendUpgraders.cs

using UnityEditor.Experimental.Rendering;
using UnityEngine;

public struct UpgradeParams
{
    public float blendMode;
    public float specularSource;
    public float glosinessSource;
    public float reflectionSource;
}

public class LegacyBlinnPhongUpgrader : MaterialUpgrader
{
    public LegacyBlinnPhongUpgrader(string oldShaderName, UpgradeParams upgraderParams)
    {
        RenameShader(oldShaderName, "ScriptableRenderPipeline/LowEndMobile/NonPBR");
        SetNewFloatProperty("_Mode", upgraderParams.blendMode);
        SetNewFloatProperty("_SpecSource", upgraderParams.specularSource);
        SetNewFloatProperty("_GlossinessSource", upgraderParams.glosinessSource);
        SetNewFloatProperty("_ReflectionSource", upgraderParams.reflectionSource);

        if (oldShaderName.Contains("Legacy Shaders/Self-Illumin"))
        {
            RenameTexture("_MainTex", "_EmissionMap");
            RemoveTexture("_MainTex");
            SetNewColorProperty("_EmissionColor", Color.white);
        }
    }
}

public class ParticlesMultiplyUpgrader : MaterialUpgrader
{
    public ParticlesMultiplyUpgrader(string oldShaderName)
    {
        RenameShader(oldShaderName, "ScriptableRenderPipeline/LowEndMobile/Particles/Multiply");
    }
}

public class ParticlesAdditiveUpgrader : MaterialUpgrader
{
    public ParticlesAdditiveUpgrader(string oldShaderName)
    {
        RenameShader(oldShaderName, "ScriptableRenderPipeline/LowEndMobile/Particles/Additive");
    }
}