Begin instanced rendering for simple shapes

include/gpu/GrDrawContext.h

Index: include/gpu/GrDrawContext.h
diff --git a/include/gpu/GrDrawContext.h b/include/gpu/GrDrawContext.h
index f56570b10beaf3cd3ca2e2fb8ca6a2a42f3fee92..96f42693b48ef06ce08400cc5d5864f8dfbfbf4a 100644
--- a/include/gpu/GrDrawContext.h
+++ b/include/gpu/GrDrawContext.h
@@ -14,6 +14,7 @@
 #include "SkRefCnt.h"
 #include "SkRegion.h"
 #include "SkSurfaceProps.h"
+#include "../private/GrInstancedPipelineInfo.h"
 #include "../private/GrSingleOwner.h"
 
 class GrAtlasTextContext;
@@ -346,6 +347,7 @@ private:
     GrDrawTarget*                     fDrawTarget;
     SkAutoTDelete<GrAtlasTextContext> fAtlasTextContext;
     GrContext*                        fContext;
+    GrInstancedPipelineInfo           fInstancedPipelineInfo;
 
     SkSurfaceProps                    fSurfaceProps;
     GrAuditTrail*                     fAuditTrail;