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 6f6f0af88821741649829ad680d488e15bdac12a..0d976c786700e45ba93cff7e7869bbcebee33afa 100644
--- a/src/gpu/GrOptDrawState.cpp
+++ b/src/gpu/GrOptDrawState.cpp
@@ -122,6 +122,16 @@ GrOptDrawState::GrOptDrawState(const GrDrawState& drawState,
 
     // now create a key
     gpu->buildProgramDesc(*this, descInfo, drawType, &fDesc);
+
+    // let the GP init the batch tracker
+    if (drawState.hasGeometryProcessor()) {
+        GrGeometryProcessor::InitBT init;
+        init.fOutputColor = descInfo.fInputColorIsUsed;
+        init.fOutputCoverage = descInfo.fInputCoverageIsUsed;
+        init.fColor = this->getColor();
+        init.fCoverage = this->getCoverage();
+        fGeometryProcessor->initBatchTracker(&fBatchTracker, init);
+    }
 };
 
 void GrOptDrawState::setOutputStateInfo(const GrDrawState& ds,