Make GrDrawState and GrEffectStage use the pending io/exec ref mechanisms.

BUG=skia:2889
R=robertphillips@google.com

Author: bsalomon@google.com

Review URL: https://codereview.chromium.org/542723004
diff --git a/src/gpu/GrEffect.cpp b/src/gpu/GrEffect.cpp
index f952483..b8d945e 100644
--- a/src/gpu/GrEffect.cpp
+++ b/src/gpu/GrEffect.cpp
@@ -72,6 +72,7 @@
 
 void GrEffect::addTextureAccess(const GrTextureAccess* access) {
     fTextureAccesses.push_back(access);
+    this->addProgramResource(access->getTextureProgramResource());
 }
 
 void* GrEffect::operator new(size_t size) {