Join non-overlapping Xfer barriers

src/gpu/GrDrawTarget.cpp

Index: src/gpu/GrDrawTarget.cpp
diff --git a/src/gpu/GrDrawTarget.cpp b/src/gpu/GrDrawTarget.cpp
index 218b729faf01eae1f281699c3c4c53dfedb70a92..e0e9184d9af618214b766365533bdedd85cc5ca1 100644
--- a/src/gpu/GrDrawTarget.cpp
+++ b/src/gpu/GrDrawTarget.cpp
@@ -1065,6 +1065,15 @@ bool GrDrawTarget::PipelineInfo::getConservativeDrawBounds(SkIRect* outBounds) c
     return true;
 }
 
+void GrDrawTarget::PipelineInfo::getQuickDrawBounds(SkIRect* outBounds) const {
+    if (fHasDrawBounds) {
+        fDrawBounds.roundOut(outBounds);
+    } else {
+        GrRenderTarget* rt = fPipelineBuilder->getRenderTarget();
+        *outBounds = SkIRect::MakeWH(rt->width(), rt->height());
+    }
+}
+
 ///////////////////////////////////////////////////////////////////////////////
 
 void GrDrawTargetCaps::reset() {