Decouple contrast boost from fake gamma.

src/core/SkGlyphCache.h

Index: src/core/SkGlyphCache.h
diff --git a/src/core/SkGlyphCache.h b/src/core/SkGlyphCache.h
index 2b5262ba5eb914446d507dff99b7636eeb5450ec..9ae47c6207f281ede60c78cb4049e89e9b47cec8 100644
--- a/src/core/SkGlyphCache.h
+++ b/src/core/SkGlyphCache.h
@@ -285,13 +285,15 @@ public:
     SkAutoGlyphCache(const SkPaint& paint,
                      const SkSurfaceProps* surfaceProps,
                      const SkMatrix* matrix)
-        : INHERITED(paint.detachCache(surfaceProps, SkPaint::FakeGamma::On, matrix))
+        : INHERITED(paint.detachCache(surfaceProps,
+                                      SkPaint::kFakeGammaAndBoostContrast_ScalerContextFlags,
+                                      matrix))
     {}
     SkAutoGlyphCache(const SkPaint& paint,
                      const SkSurfaceProps* surfaceProps,
-                     SkPaint::FakeGamma fakeGamma,
+                     uint32_t scalerContextFlags,
                      const SkMatrix* matrix)
-        : INHERITED(paint.detachCache(surfaceProps, fakeGamma, matrix))
+        : INHERITED(paint.detachCache(surfaceProps, scalerContextFlags, matrix))
     {}
 private:
     using INHERITED = std::unique_ptr<SkGlyphCache, SkGlyphCache::AttachCacheFunctor>;
@@ -302,7 +304,7 @@ public:
     SkAutoGlyphCacheNoGamma(const SkPaint& paint,
                             const SkSurfaceProps* surfaceProps,
                             const SkMatrix* matrix)
-        : SkAutoGlyphCache(paint, surfaceProps, SkPaint::FakeGamma::Off, matrix)
+        : SkAutoGlyphCache(paint, surfaceProps, SkPaint::kNone_ScalerContextFlags, matrix)
     {}
 };
 #define SkAutoGlyphCache(...) SK_REQUIRE_LOCAL_VAR(SkAutoGlyphCache)