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

src/gpu/GrTextureAccess.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrTextureAccess.h"
-
+#include "GrColor.h"
 #include "GrTexture.h"
 
 GrTextureAccess::GrTextureAccess() {
 #if GR_DEBUG
     memcpy(fSwizzle, "void", 5);
     fSwizzleMask = 0xbeeffeed;
 #endif
 }
 
 GrTextureAccess::GrTextureAccess(GrTexture* texture, const GrTextureParams& params) {
@@ skipping 41 matching lines @@
     fTexture.reset(SkRef(texture));
     this->setSwizzle(swizzle);
 }
 
 void GrTextureAccess::reset(GrTexture* texture,
                             const GrTextureParams& params) {
     GrAssert(NULL != texture);
     fTexture.reset(SkRef(texture));
     fParams = params;
     memcpy(fSwizzle, "rgba", 5);
-    fSwizzleMask = (kRGB_SwizzleMask | kA_SwizzleFlag);
+    fSwizzleMask = kRGBA_GrColorComponentFlags;
 }
 
 void GrTextureAccess::reset(GrTexture* texture,
                             bool bilerp,
                             SkShader::TileMode tileXAndY) {
     GrAssert(NULL != texture);
     fTexture.reset(SkRef(texture));
     fParams.reset(tileXAndY, bilerp);
     memcpy(fSwizzle, "rgba", 5);
-    fSwizzleMask = (kRGB_SwizzleMask | kA_SwizzleFlag);
+    fSwizzleMask = kRGBA_GrColorComponentFlags;
 }
 
 void GrTextureAccess::setSwizzle(const char* swizzle) {
     fSwizzleMask = 0;
     memset(fSwizzle, '\0', 5);
     for (int i = 0; i < 4 && '\0' != swizzle[i]; ++i) {
         fSwizzle[i] = swizzle[i];
         switch (swizzle[i]) {
             case 'r':
-                fSwizzleMask |= kR_SwizzleFlag;
+                fSwizzleMask |= kR_GrColorComponentFlag;
                 break;
             case 'g':
-                fSwizzleMask |= kG_SwizzleFlag;
+                fSwizzleMask |= kG_GrColorComponentFlag;
                 break;
             case 'b':
-                fSwizzleMask |= kB_SwizzleFlag;
+                fSwizzleMask |= kB_GrColorComponentFlag;
                 break;
             case 'a':
-                fSwizzleMask |= kA_SwizzleFlag;
+                fSwizzleMask |= kA_GrColorComponentFlag;
                 break;
             default:
                 GrCrash("Unexpected swizzle string character.");
                 break;
         }
     }
 }