Merge pull request #1116 from lyndon-unity/master

Enabled the texture streaming debugging for 2018.2+

ScriptableRenderPipeline/Core/CoreRP/ShaderLibrary/Common.hlsl

     // Metal doesn't support high enough OpenGL version
 
 #if defined(MIP_COUNT_SUPPORTED)
-    uint width, height, depth, mipCount;
-    width = height = depth = mipCount = 0;
-    tex.GetDimensions(width, height, depth, mipCount);
-    return mipCount;
+    uint mipLevel, width, height, mipCount;
+    mipLevel = width = height = mipCount = 0;
+	tex.GetDimensions(mipLevel, width, height, mipCount);
+    return mipCount;	
 #else
     return 0;
 #endif

ScriptableRenderPipeline/HDRenderPipeline/HDRP/Debug/DebugDisplay.cs

 
         public void UpdateMaterials()
         {
-            //if (mipMapDebugSettings.debugMipMapMode != 0)
-            //    Texture.SetStreamingTextureMaterialDebugProperties();
+#if UNITY_2018_2_OR_NEWER
+            if (mipMapDebugSettings.debugMipMapMode != 0)
+                Texture.SetStreamingTextureMaterialDebugProperties();
+#endif
         }
 
         public bool DebugNeedsExposure()