Remove array of TextureSampler pointers from GrIOResourceProcessor.

Instead store sampler count on base class and subclasses implement a
virtual to get the ith sampler.

Change-Id: I13e2447a6467a09761d8615acb4aa360b87b1476
Reviewed-on: https://skia-review.googlesource.com/141563
Commit-Queue: Brian Salomon <bsalomon@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
diff --git a/src/gpu/effects/GrMatrixConvolutionEffect.cpp b/src/gpu/effects/GrMatrixConvolutionEffect.cpp
index c2c1f7c..ccb32cf 100644
--- a/src/gpu/effects/GrMatrixConvolutionEffect.cpp
+++ b/src/gpu/effects/GrMatrixConvolutionEffect.cpp
@@ -165,7 +165,7 @@
         , fBias(SkScalarToFloat(bias) / 255.0f)
         , fConvolveAlpha(convolveAlpha) {
     this->addCoordTransform(&fCoordTransform);
-    this->addTextureSampler(&fTextureSampler);
+    this->setTextureSamplerCnt(1);
     for (int i = 0; i < kernelSize.width() * kernelSize.height(); i++) {
         fKernel[i] = SkScalarToFloat(kernel[i]);
     }
@@ -183,7 +183,7 @@
         , fBias(that.fBias)
         , fConvolveAlpha(that.fConvolveAlpha) {
     this->addCoordTransform(&fCoordTransform);
-    this->addTextureSampler(&fTextureSampler);
+    this->setTextureSamplerCnt(1);
     memcpy(fKernel, that.fKernel, sizeof(float) * fKernelSize.width() * fKernelSize.height());
     memcpy(fKernelOffset, that.fKernelOffset, sizeof(fKernelOffset));
 }