Batch multiple single NVPR draw paths to instanced draws

src/gpu/gl/GrGLPath.cpp

Index: src/gpu/gl/GrGLPath.cpp
diff --git a/src/gpu/gl/GrGLPath.cpp b/src/gpu/gl/GrGLPath.cpp
index ed5a31d9d2f67bf97d90c702c8d2327160e79e48..e2d4703688d61ac1c6a9d33292ca55c47d06bbed 100644
--- a/src/gpu/gl/GrGLPath.cpp
+++ b/src/gpu/gl/GrGLPath.cpp
@@ -333,6 +333,12 @@ GrGLPath::GrGLPath(GrGLGpu* gpu, const SkPath& origSkPath, const GrStrokeInfo& o
     this->registerWithCache(SkBudgeted::kYes);
 }
 
+bool GrGLPath::canCombineDrawPathBatchWith(const GrPath& o) const {
+    const GrGLPath* other = static_cast<const GrGLPath*>(&o);
+    return fShouldStroke == other->fShouldStroke &&
+            fShouldFill == other->fShouldFill;
+}
+
 void GrGLPath::onRelease() {
     if (0 != fPathID) {
         static_cast<GrGLGpu*>(this->getGpu())->glPathRendering()->deletePaths(fPathID, 1);