Simplify gamma-correctness for text rendering.

src/gpu/text/GrAtlasTextContext.h

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrAtlasTextContext_DEFINED
 #define GrAtlasTextContext_DEFINED
 
@@ skipping 35 matching lines @@
                       const SkMatrix& viewMatrix, const SkSurfaceProps&, const SkTextBlob*,
                       SkScalar x, SkScalar y,
                       SkDrawFilter*, const SkIRect& clipBounds);
 
 private:
     GrAtlasTextContext();
 
     // sets up the descriptor on the blob and returns a detached cache.  Client must attach
     inline static GrColor ComputeCanonicalColor(const SkPaint&, bool lcd);
     // Determines if we need to use fake gamma (and contrast boost):
-    inline static uint32_t ComputeScalerContextFlags(GrDrawContext*, const GrPaint&);
+    inline static uint32_t ComputeScalerContextFlags(GrDrawContext*);
     static void RegenerateTextBlob(GrAtlasTextBlob* bmp,
                                    GrBatchFontCache*,
                                    const GrShaderCaps&,
                                    const SkPaint& skPaint, GrColor,
                                    uint32_t scalerContextFlags,
                                    const SkMatrix& viewMatrix,
                                    const SkSurfaceProps&,
                                    const SkTextBlob* blob, SkScalar x, SkScalar y,
                                    SkDrawFilter* drawFilter);
     inline static bool HasLCD(const SkTextBlob*);
@@ skipping 23 matching lines @@
     SkAutoTUnref<const GrDistanceFieldAdjustTable> fDistanceAdjustTable;
 
 #ifdef GR_TEST_UTILS
     static const uint32_t kTextBlobBatchScalerContextFlags =
         SkPaint::kFakeGammaAndBoostContrast_ScalerContextFlags;
     DRAW_BATCH_TEST_FRIEND(TextBlobBatch);
 #endif
 };
 
 #endif