Move functions from SkGr to SkGrPriv.h

tests/GrGetCoeffBlendKnownComponentsTest.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 "Test.h"
 
 #if SK_SUPPORT_GPU
 
 #include "GrBlend.h"
 #include "SkGr.h"
+#include "SkGrPriv.h"
 #include "SkRandom.h"
 #include "SkXfermode.h"
 
 static GrColor make_baseline_color(GrColor src, GrColor dst, const SkXfermode* xm) {
     SkPMColor skSrc = GrColorToSkPMColor(src);
     SkPMColor skDst = GrColorToSkPMColor(dst);
     if (xm) {
         xm->xfer32(&skDst, &skSrc, 1, nullptr);
     } else {
         // null means src-over
@@ skipping 69 matching lines @@
         kOne_GrBlendCoeff, kISA_GrBlendCoeff,
         0xFF808080, (kG_GrColorComponentFlag | kB_GrColorComponentFlag | kA_GrColorComponentFlag),
         0xFF606060, kRGBA_GrColorComponentFlags,
         &outColor, &outFlags);
     REPORTER_ASSERT(reporter,
                     (kG_GrColorComponentFlag | kB_GrColorComponentFlag | kA_GrColorComponentFlag) == outFlags &&
                     (outColor & 0xFFFFFF00) == 0xFF808000);
 }
 
 #endif