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/effects/SkGpuBlurUtils.cpp b/src/effects/SkGpuBlurUtils.cpp
index 260b2e2..0769237 100644
--- a/src/effects/SkGpuBlurUtils.cpp
+++ b/src/effects/SkGpuBlurUtils.cpp
@@ -132,10 +132,10 @@
                 matrix,
                 domain,
                 GrTextureDomainEffect::kDecal_WrapMode,
-                true));
+                GrTextureParams::kBilerp_FilterMode));
             paint.addColorEffect(effect);
         } else {
-            GrTextureParams params(SkShader::kClamp_TileMode, true);
+            GrTextureParams params(SkShader::kClamp_TileMode, GrTextureParams::kBilerp_FilterMode);
             paint.addColorTextureEffect(srcTexture, matrix, params);
         }
         scale_rect(&dstRect, i < scaleFactorX ? 0.5f : 1.0f,
@@ -199,7 +199,7 @@
 
         GrPaint paint;
         // FIXME:  this should be mitchell, not bilinear.
-        GrTextureParams params(SkShader::kClamp_TileMode, true);
+        GrTextureParams params(SkShader::kClamp_TileMode, GrTextureParams::kBilerp_FilterMode);
         paint.addColorTextureEffect(srcTexture, matrix, params);
 
         SkRect dstRect(srcRect);