Decouple contrast boost from fake gamma.

src/gpu/text/GrStencilAndCoverTextContext.cpp

Index: src/gpu/text/GrStencilAndCoverTextContext.cpp
diff --git a/src/gpu/text/GrStencilAndCoverTextContext.cpp b/src/gpu/text/GrStencilAndCoverTextContext.cpp
index 151858b8b99de19899a058dfaa6ebbb3d5ad107e..f0c66979d565cdbf2cc265565163f9c778ae08cc 100644
--- a/src/gpu/text/GrStencilAndCoverTextContext.cpp
+++ b/src/gpu/text/GrStencilAndCoverTextContext.cpp
@@ -631,7 +631,8 @@ void GrStencilAndCoverTextContext::TextRun::draw(GrContext* ctx,
 
 SkGlyphCache* GrStencilAndCoverTextContext::TextRun::getGlyphCache() const {
     if (!fDetachedGlyphCache) {
-        fDetachedGlyphCache = fFont.detachCache(nullptr, SkPaint::FakeGamma::Off, nullptr);
+        fDetachedGlyphCache = fFont.detachCache(nullptr, SkPaint::kNone_ScalerContextFlags,
+                                                nullptr);
     }
     return fDetachedGlyphCache;
 }