Check for xfer barriers in GrBatch, auto-issue barriers in GrGpu

src/gpu/batches/GrDrawVerticesBatch.cpp

Index: src/gpu/batches/GrDrawVerticesBatch.cpp
diff --git a/src/gpu/batches/GrDrawVerticesBatch.cpp b/src/gpu/batches/GrDrawVerticesBatch.cpp
index 397bb2b8f1587499803071db8f6705f4fa1bf4b1..f36c54b067f1d18f14de02cb164e294ba7f9eaf6 100644
--- a/src/gpu/batches/GrDrawVerticesBatch.cpp
+++ b/src/gpu/batches/GrDrawVerticesBatch.cpp
@@ -183,8 +183,9 @@ void GrDrawVerticesBatch::generateGeometry(GrBatchTarget* batchTarget) {
     batchTarget->draw(vertices);
 }
 
-bool GrDrawVerticesBatch::onCombineIfPossible(GrBatch* t) {
-    if (!this->pipeline()->isEqual(*t->pipeline())) {
+bool GrDrawVerticesBatch::onCombineIfPossible(GrBatch* t, const GrCaps& caps) {
+    if (!GrPipeline::CanCombine(*this->pipeline(), this->bounds(), *t->pipeline(), t->bounds(),
+                                caps)) {
         return false;
     }