Hairline batch

src/gpu/GrBatchTarget.h

Index: src/gpu/GrBatchTarget.h
diff --git a/src/gpu/GrBatchTarget.h b/src/gpu/GrBatchTarget.h
index 82dad45c22dc18e8588e4b6846968770b99cca7e..ec08aea5bf4e61de62c60f734d02e4c6125a0f41 100644
--- a/src/gpu/GrBatchTarget.h
+++ b/src/gpu/GrBatchTarget.h
@@ -17,6 +17,9 @@
  * that render their batch.
  */
 
+class GrIndexBufferAllocPool;
+class GrVertexBufferAllocPool;
+
 class GrBatchTarget : public SkNoncopyable {
 public:
     GrBatchTarget(GrGpu* gpu,
@@ -43,6 +46,8 @@ public:
         return &fFlushBuffer.back().fBatchTracker;
     }
 
+    const GrDrawTargetCaps& caps() const { return *fGpu->caps(); }
+
     GrVertexBufferAllocPool* vertexPool() { return fVertexPool; }
     GrIndexBufferAllocPool* indexPool() { return fIndexPool; }