make the filter mode for GrTextureAccess an enum so we can plumb down

src/gpu/effects/GrTextureDomainEffect.cpp

Index: src/gpu/effects/GrTextureDomainEffect.cpp
diff --git a/src/gpu/effects/GrTextureDomainEffect.cpp b/src/gpu/effects/GrTextureDomainEffect.cpp
index 96372d926f6bd7eb7771e4b654ac948f3506584f..eb4001d949dced54e9613900f7baf47726d51013 100644
--- a/src/gpu/effects/GrTextureDomainEffect.cpp
+++ b/src/gpu/effects/GrTextureDomainEffect.cpp
@@ -153,11 +153,11 @@ GrEffectRef* GrTextureDomainEffect::Create(GrTexture* texture,
                                            const SkMatrix& matrix,
                                            const SkRect& domain,
                                            WrapMode wrapMode,
-                                           bool bilerp,
+                                           GrTextureParams::FilterMode filterMode,
                                            CoordsType coordsType) {
     static const SkRect kFullRect = {0, 0, SK_Scalar1, SK_Scalar1};
     if (kClamp_WrapMode == wrapMode && domain.contains(kFullRect)) {
-        return GrSimpleTextureEffect::Create(texture, matrix, bilerp);
+        return GrSimpleTextureEffect::Create(texture, matrix, filterMode);
     } else {
         SkRect clippedDomain;
         // We don't currently handle domains that are empty or don't intersect the texture.
@@ -176,7 +176,7 @@ GrEffectRef* GrTextureDomainEffect::Create(GrTexture* texture,
                                                                   matrix,
                                                                   clippedDomain,
                                                                   wrapMode,
-                                                                  bilerp,
+                                                                  filterMode,
                                                                   coordsType)));
         return CreateEffectRef(effect);
 
@@ -187,9 +187,9 @@ GrTextureDomainEffect::GrTextureDomainEffect(GrTexture* texture,
                                              const SkMatrix& matrix,
                                              const SkRect& domain,
                                              WrapMode wrapMode,
-                                             bool bilerp,
+                                             GrTextureParams::FilterMode filterMode,
                                              CoordsType coordsType)
-    : GrSingleTextureEffect(texture, matrix, bilerp, coordsType)
+    : GrSingleTextureEffect(texture, matrix, filterMode, coordsType)
     , fWrapMode(wrapMode)
     , fTextureDomain(domain) {
 }
@@ -239,6 +239,6 @@ GrEffectRef* GrTextureDomainEffect::TestCreate(SkMWCRandom* random,
                                          matrix,
                                          domain,
                                          wrapMode,
-                                         bilerp,
+                                         bilerp ? GrTextureParams::kBilerp_FilterMode : GrTextureParams::kNone_FilterMode,
                                          coords);
 }