Revert of create and thread batch tracker object

src/gpu/GrGeometryProcessor.h

Index: src/gpu/GrGeometryProcessor.h
diff --git a/src/gpu/GrGeometryProcessor.h b/src/gpu/GrGeometryProcessor.h
index 27383a4df49df6dd3e618f24f72fed5a5e745a1d..17344d2bb4c251df6469aff20512bb4ba98fdf13 100644
--- a/src/gpu/GrGeometryProcessor.h
+++ b/src/gpu/GrGeometryProcessor.h
@@ -11,30 +11,6 @@
 #include "GrGeometryData.h"
 #include "GrProcessor.h"
 #include "GrShaderVar.h"
-
-/*
- * A struct for tracking batching decisions.  While this lives on GrOptState, it is managed
- * entirely by the derived classes of the GP.
- */
-class GrBatchTracker {
-public:
-    template <typename T> const T& cast() const {
-        SkASSERT(sizeof(T) <= kMaxSize);
-        return *reinterpret_cast<const T*>(fData);
-    }
-
-    template <typename T> T* cast() {
-        SkASSERT(sizeof(T) <= kMaxSize);
-        return reinterpret_cast<T*>(fData);
-    }
-
-    static const size_t kMaxSize = 32;
-
-private:
-    uint8_t fData[kMaxSize];
-};
-
-class GrOptDrawState;
 
 /**
  * A GrGeometryProcessor is used to perform computation in the vertex shader and
@@ -97,15 +73,6 @@
         return this->onIsEqual(that);
     }
 
-    struct InitBT {
-        bool fOutputColor;
-        bool fOutputCoverage;
-        GrColor fColor;
-        GrColor fCoverage;
-    };
-
-    virtual void initBatchTracker(GrBatchTracker*, const InitBT&) const {}
-
     // TODO this is a total hack until the gp can own whether or not it uses uniform
     // color / coverage
     bool hasVertexColor() const { return fHasVertexColor; }