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/GrRRectBlurEffect.cpp b/src/gpu/effects/GrRRectBlurEffect.cpp
index 9ab844a..6101f24 100644
--- a/src/gpu/effects/GrRRectBlurEffect.cpp
+++ b/src/gpu/effects/GrRRectBlurEffect.cpp
@@ -146,11 +146,14 @@
         , fRect(src.fRect)
         , fCornerRadius(src.fCornerRadius)
         , fNinePatchSampler(src.fNinePatchSampler) {
-    this->addTextureSampler(&fNinePatchSampler);
+    this->setTextureSamplerCnt(1);
 }
 std::unique_ptr<GrFragmentProcessor> GrRRectBlurEffect::clone() const {
     return std::unique_ptr<GrFragmentProcessor>(new GrRRectBlurEffect(*this));
 }
+const GrFragmentProcessor::TextureSampler& GrRRectBlurEffect::onTextureSampler(int index) const {
+    return IthTextureSampler(index, fNinePatchSampler);
+}
 GR_DEFINE_FRAGMENT_PROCESSOR_TEST(GrRRectBlurEffect);
 #if GR_TEST_UTILS
 std::unique_ptr<GrFragmentProcessor> GrRRectBlurEffect::TestCreate(GrProcessorTestData* d) {