NEON optimizations for gray -> RGBA (or BGRA) conversions

src/core/SkOpts.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkOnce.h"
 #include "SkOpts.h"
 
@@ skipping 66 matching lines @@
 
     decltype(matrix_translate)       matrix_translate       = sk_default::matrix_translate;
     decltype(matrix_scale_translate) matrix_scale_translate = sk_default::matrix_scale_translate;
     decltype(matrix_affine)          matrix_affine          = sk_default::matrix_affine;
 
     decltype(RGBA_to_BGRA) RGBA_to_BGRA = sk_default::RGBA_to_BGRA;
     decltype(RGBA_to_rgbA) RGBA_to_rgbA = sk_default::RGBA_to_rgbA;
     decltype(RGBA_to_bgrA) RGBA_to_bgrA = sk_default::RGBA_to_bgrA;
     decltype(RGB_to_RGB1)  RGB_to_RGB1  = sk_default::RGB_to_RGB1;
     decltype(RGB_to_BGR1)  RGB_to_BGR1  = sk_default::RGB_to_BGR1;
+    decltype(gray_to_RGB1) gray_to_RGB1 = sk_default::gray_to_RGB1;
 
     // Each Init_foo() is defined in src/opts/SkOpts_foo.cpp.
     void Init_ssse3();
     void Init_sse41();
     void Init_sse42() {}
     void Init_avx();
     void Init_avx2() {}
     void Init_neon();
 
     static void init() {
@@ skipping 26 matching lines @@
 
     SK_DECLARE_STATIC_ONCE(gInitOnce);
     void Init() { SkOnce(&gInitOnce, init); }
 
 #if SK_ALLOW_STATIC_GLOBAL_INITIALIZERS
     static struct AutoInit {
         AutoInit() { Init(); }
     } gAutoInit;
 #endif
 }