Bilinear optimization for 1D convolution.

src/gpu/effects/Gr1DKernelEffect.h

Index: src/gpu/effects/Gr1DKernelEffect.h
diff --git a/src/gpu/effects/Gr1DKernelEffect.h b/src/gpu/effects/Gr1DKernelEffect.h
index 519d6dbeb5663c653583b567fdab387a9a4f81f6..2d4aa230fefee66d32cbf61bba44d9e4c7a0dfa8 100644
--- a/src/gpu/effects/Gr1DKernelEffect.h
+++ b/src/gpu/effects/Gr1DKernelEffect.h
@@ -28,6 +28,8 @@ public:
         kY_Direction,
     };
 
+    // Constructor using default nearest-neighbor sampling for the input texture
+    // filter mode.
     Gr1DKernelEffect(GrTexture* texture,
                      Direction direction,
                      int radius)
@@ -35,6 +37,16 @@ public:
         , fDirection(direction)
         , fRadius(radius) {}
 
+    Gr1DKernelEffect(GrTexture* texture,
+                     Direction direction,
+                     int radius,
+                     GrTextureParams::FilterMode filterMode)
+        : INHERITED(texture,
+                    GrCoordTransform::MakeDivByTextureWHMatrix(texture),
+                    filterMode)
+        , fDirection(direction)
+        , fRadius(radius) {}
+
     virtual ~Gr1DKernelEffect() {};
 
     static int WidthFromRadius(int radius) { return 2 * radius + 1; }