Oval and stroke AA rect now batch

src/gpu/GrGpu.h

Index: src/gpu/GrGpu.h
diff --git a/src/gpu/GrGpu.h b/src/gpu/GrGpu.h
index 54fe471c88c2fceccbed9013337333277d8a4e72..5a625ed228e0c66ad644ad3c122589a887b334bc 100644
--- a/src/gpu/GrGpu.h
+++ b/src/gpu/GrGpu.h
@@ -142,6 +142,13 @@ public:
      */
     GrIndexBuffer* createIndexBuffer(size_t size, bool dynamic);
 
+    //TODO comment
+    GrIndexBuffer* createIndexBufferPattern(const uint16_t* pattern,

[bsalomon, 2014/10/22 17:51:50]

I like this... but maybe we should call it createInstancedIndexBuffer or
something similar to tie its name to drawIndexedInstances?

Also, can we make the existing instance ibs use this?

+                                            int patternSize,
+                                            int reps,
+                                            int vertCount,
+                                            bool isDynamic = false);
+
     /**
      * Returns an index buffer that can be used to render quads.
      * Six indices per quad: 0, 1, 2, 0, 2, 3, etc.