Added registerChild; transforms, textures, glKey automatically handled.

src/gpu/GrProcessor.cpp

Index: src/gpu/GrProcessor.cpp
diff --git a/src/gpu/GrProcessor.cpp b/src/gpu/GrProcessor.cpp
index e3cfa78a6dca692591fdf98786f6cca8074298f1..b990f9b2859b8806b2370dc79acda30840c0340e 100644
--- a/src/gpu/GrProcessor.cpp
+++ b/src/gpu/GrProcessor.cpp
@@ -135,6 +135,10 @@ void GrFragmentProcessor::addCoordTransform(const GrCoordTransform* transform) {
     SkDEBUGCODE(transform->setInProcessor();)
 }
 
+void GrFragmentProcessor::registerChildProcessor(GrFragmentProcessor* child) {
+    fChildProcessors.push_back(child);
+}
+
 bool GrFragmentProcessor::hasSameTransforms(const GrFragmentProcessor& that) const {
     if (fCoordTransforms.count() != that.fCoordTransforms.count()) {
         return false;