added some required "using UnityEngine.Rendering" (now SRP API is not in Experimental namespace anymore)

ScriptableRenderPipeline/Core/Shadow/ShadowUtilities.cs

+using UnityEngine.Rendering;
 
 namespace UnityEngine.Experimental.Rendering
 {

ScriptableRenderPipeline/HDRenderPipeline/Debug/LightingDebugPanel.cs

 using UnityEngine;
 using System;
+using UnityEngine.Rendering;
 
 #if UNITY_EDITOR
 using UnityEditor;

ScriptableRenderPipeline/HDRenderPipeline/Editor/HDBaseEditor.cs

-using UnityEngine.Experimental.Rendering;
+using UnityEngine.Rendering;
 using UnityEngine.Experimental.Rendering.HDPipeline;
 
 namespace UnityEditor.Experimental.Rendering.HDPipeline

ScriptableRenderPipeline/HDRenderPipeline/Editor/HDRenderPipelineInspector.cs

 using System.Reflection;
-using UnityEngine.Experimental.Rendering;
+using UnityEngine.Rendering;
 using UnityEngine.Experimental.Rendering.HDPipeline;
 
 namespace UnityEditor.Experimental.Rendering.HDPipeline
             EditorGUILayout.PropertyField(m_SpotCookieSize, s_Styles.spotCookieSize);
             EditorGUILayout.PropertyField(m_PointCookieSize, s_Styles.pointCookieSize);
             EditorGUILayout.PropertyField(m_ReflectionCubemapSize, s_Styles.reflectionCubemapSize);
-            
+
             // Commented ou until we have proper realtime BC6H compression
             //EditorGUILayout.PropertyField(m_ReflectionCacheCompressed, s_Styles.reflectionCacheCompressed);
 
 
             EditorGUILayout.LabelField(s_Styles.defaults, EditorStyles.boldLabel);
             EditorGUI.indentLevel++;
-            EditorGUILayout.PropertyField(m_RenderPipelineResources, s_Styles.renderPipelineResources);            
+            EditorGUILayout.PropertyField(m_RenderPipelineResources, s_Styles.renderPipelineResources);
             EditorGUILayout.PropertyField(m_DefaultDiffuseMaterial, s_Styles.defaultDiffuseMaterial);
             EditorGUILayout.PropertyField(m_DefaultShader, s_Styles.defaultShader);
             EditorGUI.indentLevel--;

ScriptableRenderPipeline/HDRenderPipeline/Editor/HDRenderPipelineMenuItems.cs

 using System.IO;
 using UnityEngine;
+using UnityEngine.Rendering;
 using UnityEngine.Experimental.Rendering;
 using UnityEngine.Experimental.Rendering.HDPipeline;
 

ScriptableRenderPipeline/HDRenderPipeline/Editor/Material/Lit/LitUI.cs

 using System;
 using UnityEngine;
+using UnityEngine.Rendering;
 using UnityEngine.Experimental.Rendering;
 using UnityEngine.Experimental.Rendering.HDPipeline;
 

ScriptableRenderPipeline/HDRenderPipeline/HDRenderPipelineAsset.cs

+using UnityEngine.Rendering;
+
 namespace UnityEngine.Experimental.Rendering.HDPipeline
 {
     // The HDRenderPipeline assumes linear lighting. Doesn't work with gamma.

ScriptableRenderPipeline/HDRenderPipeline/HDStringConstants.cs

+using UnityEngine.Rendering;
+
 namespace UnityEngine.Experimental.Rendering.HDPipeline
 {
     public static class HDShaderPassNames
 
         public static readonly int[] _DBufferTexture =
         {
-            Shader.PropertyToID("_DBufferTexture0"), 
+            Shader.PropertyToID("_DBufferTexture0"),
-        public static readonly int[] _SSSBufferTexture = 
+        public static readonly int[] _SSSBufferTexture =
         {
             Shader.PropertyToID("_SSSBufferTexture0"),
             Shader.PropertyToID("_SSSBufferTexture1"),

ScriptableRenderPipeline/HDRenderPipeline/HDUtils.cs

 using System;
 using System.Collections.Generic;
 using System.Linq;
+using UnityEngine.Rendering;
 
 namespace UnityEngine.Experimental.Rendering.HDPipeline
 {

ScriptableRenderPipeline/LightweightPipeline/Data/LightweightPipelineAsset.cs

+using UnityEngine.Rendering;
+
 namespace UnityEngine.Experimental.Rendering.LightweightPipeline
 {
     public enum ShadowCascades

TestbedPipelines/Fptl/SkyboxHelper.cs

 using System.Collections.Generic;
 using UnityEngine;
+using UnityEngine.Rendering;
 
 namespace UnityEngine.Experimental.Rendering
 {

Tests/RenderloopTests/Editor/CullResultsTest.cs

 using UnityEngine;
-using UnityEngine.Experimental.Rendering;
+using UnityEngine.Rendering;
 using NUnit.Framework;
 
 [TestFixture]