Use constexpr constructors of GrStencilSettings rather than hacky macro system

src/gpu/gl/GrGLUtil.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #include "GrGLUtil.h"
 #include "SkMatrix.h"
@@ skipping 325 matching lines @@
     static const GrGLenum gTable[] = {
         GR_GL_ALWAYS,           // kAlways_StencilFunc
         GR_GL_NEVER,            // kNever_StencilFunc
         GR_GL_GREATER,          // kGreater_StencilFunc
         GR_GL_GEQUAL,           // kGEqual_StencilFunc
         GR_GL_LESS,             // kLess_StencilFunc
         GR_GL_LEQUAL,           // kLEqual_StencilFunc,
         GR_GL_EQUAL,            // kEqual_StencilFunc,
         GR_GL_NOTEQUAL,         // kNotEqual_StencilFunc,
     };
-    GR_STATIC_ASSERT(SK_ARRAY_COUNT(gTable) == kBasicStencilFuncCount);
+    GR_STATIC_ASSERT(SK_ARRAY_COUNT(gTable) == kBasicStencilFuncCnt);
     GR_STATIC_ASSERT(0 == kAlways_StencilFunc);
     GR_STATIC_ASSERT(1 == kNever_StencilFunc);
     GR_STATIC_ASSERT(2 == kGreater_StencilFunc);
     GR_STATIC_ASSERT(3 == kGEqual_StencilFunc);
     GR_STATIC_ASSERT(4 == kLess_StencilFunc);
     GR_STATIC_ASSERT(5 == kLEqual_StencilFunc);
     GR_STATIC_ASSERT(6 == kEqual_StencilFunc);
     GR_STATIC_ASSERT(7 == kNotEqual_StencilFunc);
-    SkASSERT((unsigned) basicFunc < kBasicStencilFuncCount);
+    SkASSERT((unsigned) basicFunc < kBasicStencilFuncCnt);
 
     return gTable[basicFunc];
 }