Eliminate special case nvpr batch handling

src/gpu/GrRenderTarget.cpp

Index: src/gpu/GrRenderTarget.cpp
diff --git a/src/gpu/GrRenderTarget.cpp b/src/gpu/GrRenderTarget.cpp
index ebbfae9b95f07fa722e7617bc2ecaf79cc6b262d..6a9d48997ee5b2c57f8ee0598d944feb8be8c41c 100644
--- a/src/gpu/GrRenderTarget.cpp
+++ b/src/gpu/GrRenderTarget.cpp
@@ -105,6 +105,10 @@ bool GrRenderTargetPriv::attachStencilAttachment(GrStencilAttachment* stencil) {
     return true;
 }
 
+int GrRenderTargetPriv::numStencilBits() const {
+    return fRenderTarget->fStencilAttachment ? fRenderTarget->fStencilAttachment->bits() : 0;
+}
+
 const GrGpu::MultisampleSpecs&
 GrRenderTargetPriv::getMultisampleSpecs(const GrStencilSettings& stencil) const {
     return fRenderTarget->getGpu()->getMultisampleSpecs(fRenderTarget, stencil);