create and thread batch tracker object

src/gpu/GrOptDrawState.cpp

Index: src/gpu/GrOptDrawState.cpp
diff --git a/src/gpu/GrOptDrawState.cpp b/src/gpu/GrOptDrawState.cpp
index b7875968135b4703fb323e0d995d5acf33f33b07..d95bd3b7c42017a2526f4fd3e7fcb662bed8502e 100644
--- a/src/gpu/GrOptDrawState.cpp
+++ b/src/gpu/GrOptDrawState.cpp
@@ -117,7 +117,17 @@ GrOptDrawState::GrOptDrawState(const GrDrawState& drawState,
     }
 
     this->setOutputStateInfo(drawState, blendOpt, caps);
-};
+
+    // let the GP init the batch tracker
+    if (drawState.hasGeometryProcessor()) {
+        GrGeometryProcessor::InitBT init;
+        init.fOutputColor = fDescInfo.fInputColorIsUsed;
+        init.fOutputCoverage = fDescInfo.fInputCoverageIsUsed;
+        init.fColor = this->getColor();
+        init.fCoverage = this->getCoverage();
+        fGeometryProcessor->initBatchTracker(&fBatchTracker, init);
+    }
+}
 
 void GrOptDrawState::setOutputStateInfo(const GrDrawState& ds,
                                         GrDrawState::BlendOpt blendOpt,