Make GrGLShaderBuilder::TextureSampler extract only required info from GrTextureAccess.

src/effects/gradients/SkGradientShader.cpp

 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkGradientShaderPriv.h"
 #include "SkLinearGradient.h"
 #include "SkRadialGradient.h"
@@ skipping 848 matching lines @@
     const GrGradientEffect& s = CastEffect<GrGradientEffect>(effect);
     return fTextureAccess.getTexture() == s.fTextureAccess.getTexture()  &&
            fTextureAccess.getParams().getTileModeX() ==
                 s.fTextureAccess.getParams().getTileModeX() &&
            this->useAtlas() == s.useAtlas() &&
            fYCoord == s.getYCoord() &&
            fMatrix.cheapEqualTo(s.getMatrix());
 }
 
 void GrGradientEffect::getConstantColorComponents(GrColor* color, uint32_t* validFlags) const {
-    if (fIsOpaque && (kA_ValidComponentFlag & *validFlags) && 0xff == GrColorUnpackA(*color)) {
-        *validFlags = kA_ValidComponentFlag;
+    if (fIsOpaque && (kA_GrColorComponentFlag & *validFlags) && 0xff == GrColorUnpackA(*color)) {
+        *validFlags = kA_GrColorComponentFlag;
     } else {
         *validFlags = 0;
     }
 }
 
 int GrGradientEffect::RandomGradientParams(SkMWCRandom* random,
                                            SkColor colors[],
                                            SkScalar** stops,
                                            SkShader::TileMode* tm) {
     int outColors = random->nextRangeU(1, kMaxRandomGradientColors);
@@ skipping 10 matching lines @@
             (*stops)[i] = stop;
             stop = i < outColors - 1 ? stop + random->nextUScalar1() * (1.f - stop) : 1.f;
         }
     }
     *tm = static_cast<SkShader::TileMode>(random->nextULessThan(SkShader::kTileModeCount));
 
     return outColors;
 }
 
 #endif