Revert of Preliminary attempt to remove batch tracker

src/gpu/GrPathProcessor.h

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrPathProcessor_DEFINED
 #define GrPathProcessor_DEFINED
 
@@ skipping 39 matching lines @@
     virtual void getGLProcessorKey(const GrBatchTracker& bt,
                                    const GrGLSLCaps& caps,
                                    GrProcessorKeyBuilder* b) const override;
 
     virtual GrGLPrimitiveProcessor* createGLInstance(const GrBatchTracker& bt,
                                                      const GrGLSLCaps& caps) const override;
 
 private:
     GrPathProcessor(GrColor color, const SkMatrix& viewMatrix, const SkMatrix& localMatrix);
 
+    /*
+     * CanCombineOutput will return true if two draws are 'batchable' from a color perspective.
+     * TODO is this really necessary?
+     */
+    static bool CanCombineOutput(GrGPInput left, GrColor lColor, GrGPInput right, GrColor rColor) {
+        if (left != right) {
+            return false;
+        }
+
+        if (kUniform_GrGPInput == left && lColor != rColor) {
+            return false;
+        }
+
+        return true;
+    }
+
+    static bool CanCombineLocalMatrices(const GrPrimitiveProcessor& l,
+                                        bool leftUsesLocalCoords,
+                                        const GrPrimitiveProcessor& r,
+                                        bool rightUsesLocalCoords) {
+        if (leftUsesLocalCoords != rightUsesLocalCoords) {
+            return false;
+        }
+
+        const GrPathProcessor& left = l.cast<GrPathProcessor>();
+        const GrPathProcessor& right = r.cast<GrPathProcessor>();
+        if (leftUsesLocalCoords && !left.localMatrix().cheapEqualTo(right.localMatrix())) {
+            return false;
+        }
+        return true;
+    }
+
     bool hasExplicitLocalCoords() const override { return false; }
 
     GrColor fColor;
     const SkMatrix fViewMatrix;
     const SkMatrix fLocalMatrix;
 
     typedef GrPrimitiveProcessor INHERITED;
 };
 
 #endif