remove unneeded friends/includes in SkPaint.h

Bug: skia:
Change-Id: Ica9f10cdb67322eb43ec38b6549146350fa5dcd9
Reviewed-on: https://skia-review.googlesource.com/c/188630
Commit-Queue: Mike Reed <reed@google.com>
Reviewed-by: Mike Reed <reed@google.com>
Auto-Submit: Mike Reed <reed@google.com>
diff --git a/src/gpu/text/GrTextContext.cpp b/src/gpu/text/GrTextContext.cpp
index ccdca2b..5169496 100644
--- a/src/gpu/text/GrTextContext.cpp
+++ b/src/gpu/text/GrTextContext.cpp
@@ -50,7 +50,7 @@
 }
 
 SkColor GrTextContext::ComputeCanonicalColor(const SkPaint& paint, bool lcd) {
-    SkColor canonicalColor = paint.computeLuminanceColor();
+    SkColor canonicalColor = SkPaintPriv::ComputeLuminanceColor(paint);
     if (lcd) {
         // This is the correct computation, but there are tons of cases where LCD can be overridden.
         // For now we just regenerate if any run in a textblob has LCD.