Experimental: Remove 2.2 special case

src/core/SkSRGB.h

 /*
  * Copyright 2016 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkSRGB_DEFINED
 #define SkSRGB_DEFINED
 
 #include "SkNx.h"
 
 /** Components for building our canonical sRGB -> linear and linear -> sRGB transformations.
  *
  *  Current best practices:
  *      - for sRGB -> linear, lookup R,G,B in sk_linear_from_srgb;
  *      - for linear -> sRGB, call sk_linear_to_srgb() for R,G,B;
  *      - the alpha channel is linear in both formats, needing at most *(1/255.0f) or *255.0f.
  *
  *  sk_linear_to_srgb() will run a little faster than usual when compiled with SSE4.1+.
  */
 
 extern const float sk_linear_from_srgb[256];
+extern const uint8_t sk_linear_to_srgb_table[8192];
 
 static inline Sk4f sk_clamp_0_255(const Sk4f& x) {
     // The order of the arguments is important here.  We want to make sure that NaN
     // clamps to zero.  Note that max(NaN, 0) = 0, while max(0, NaN) = NaN.
     return Sk4f::Min(Sk4f::Max(x, 0.0f), 255.0f);
 }
 
 // This should probably only be called from sk_linear_to_srgb() or sk_linear_to_srgb_noclamp().
 // It generally doesn't make sense to work with sRGB floats.
 static inline Sk4f sk_linear_to_srgb_needs_trunc(const Sk4f& x) {
@@ skipping 22 matching lines @@
 
 static inline Sk4i sk_linear_to_srgb_noclamp(const Sk4f& x) {
     Sk4f f = sk_linear_to_srgb_needs_trunc(x);
     for (int i = 0; i < 4; i++) {
         SkASSERTF(0.0f <= f[i] && f[i] < 256.0f, "f[%d] was %g, outside [0,256)\n", i, f[i]);
     }
     return SkNx_cast<int>(f);
 }
 
 #endif//SkSRGB_DEFINED