make the filter mode for GrTextureAccess an enum so we can plumb down
the paint's filter modes to the GPU

BUG=
R=bsalomon@google.com

Review URL: https://codereview.chromium.org/20362002

git-svn-id: http://skia.googlecode.com/svn/trunk@10368 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/gpu/effects/GrSingleTextureEffect.cpp b/src/gpu/effects/GrSingleTextureEffect.cpp
index 0c671f1..532ce04 100644
--- a/src/gpu/effects/GrSingleTextureEffect.cpp
+++ b/src/gpu/effects/GrSingleTextureEffect.cpp
@@ -18,9 +18,9 @@
 
 GrSingleTextureEffect::GrSingleTextureEffect(GrTexture* texture,
                                              const SkMatrix& m,
-                                             bool bilerp,
+                                             GrTextureParams::FilterMode filterMode,
                                              CoordsType coordsType)
-    : fTextureAccess(texture, bilerp)
+    : fTextureAccess(texture, filterMode)
     , fMatrix(m)
     , fCoordsType(coordsType) {
     this->addTextureAccess(&fTextureAccess);