Don't issue texture barriers for RT's with separate storage

src/gpu/GrCommandBuilder.cpp

Index: src/gpu/GrCommandBuilder.cpp
diff --git a/src/gpu/GrCommandBuilder.cpp b/src/gpu/GrCommandBuilder.cpp
index 2ff59bcecd257e848f1117d17ba3a19efc8e39a2..106e78185d5d613b9e5ed548f0d14db12c3d8259 100644
--- a/src/gpu/GrCommandBuilder.cpp
+++ b/src/gpu/GrCommandBuilder.cpp
@@ -82,7 +82,7 @@ GrCommandBuilder::recordXferBarrierIfNecessary(const GrPipeline& pipeline,
         return NULL;
     }
 
-    XferBarrier* xb = GrNEW_APPEND_TO_RECORDER(*this->cmdBuffer(), XferBarrier, ());
+    XferBarrier* xb = GrNEW_APPEND_TO_RECORDER(*this->cmdBuffer(), XferBarrier, (rt));
     xb->fBarrierType = barrierType;
     return xb;
 }