create and thread batch tracker object

src/gpu/gl/GrGLGeometryProcessor.h

Index: src/gpu/gl/GrGLGeometryProcessor.h
diff --git a/src/gpu/gl/GrGLGeometryProcessor.h b/src/gpu/gl/GrGLGeometryProcessor.h
index c3bee952665449a111f43d9834de5388e9c97b6b..a172904ac68aa1a55240051143c1c785247cb590 100644
--- a/src/gpu/gl/GrGLGeometryProcessor.h
+++ b/src/gpu/gl/GrGLGeometryProcessor.h
@@ -10,6 +10,7 @@
 
 #include "GrGLProcessor.h"
 
+class GrBatchTracker;
 class GrGLGPBuilder;
 
 /**
@@ -25,16 +26,19 @@ public:
     struct EmitArgs {
         EmitArgs(GrGLGPBuilder* pb,
                  const GrGeometryProcessor& gp,
+                 const GrBatchTracker& bt,
                  const char* outputColor,
                  const char* outputCoverage,
                  const TextureSamplerArray& samplers)
             : fPB(pb)
             , fGP(gp)
+            , fBT(bt)
             , fOutputColor(outputColor)
             , fOutputCoverage(outputCoverage)
             , fSamplers(samplers) {}
         GrGLGPBuilder* fPB;
         const GrGeometryProcessor& fGP;
+        const GrBatchTracker& fBT;
         const char* fOutputColor;
         const char* fOutputCoverage;
         const TextureSamplerArray& fSamplers;
@@ -45,6 +49,15 @@ public:
      */
     virtual void emitCode(const EmitArgs&) = 0;
 
+    /** A GrGLGeometryProcessor instance can be reused with any GrGLGeometryProcessor that produces
+        the same stage key; this function reads data from a GrGLGeometryProcessor and uploads any
+        uniform variables required  by the shaders created in emitCode(). The GrGeometryProcessor
+        parameter is guaranteed to be of the same type that created this GrGLGeometryProcessor and
+        to have an identical processor key as the one that created this GrGLGeometryProcessor.  */
+    virtual void setData(const GrGLProgramDataManager&,
+                         const GrGeometryProcessor&,
+                         const GrBatchTracker&) = 0;
+
 private:
     typedef GrGLProcessor INHERITED;
 };