Revert of Begin instanced rendering for simple shapes

src/gpu/GrDrawTarget.cpp

Index: src/gpu/GrDrawTarget.cpp
diff --git a/src/gpu/GrDrawTarget.cpp b/src/gpu/GrDrawTarget.cpp
index 94f7293ef93cbce3e7a9d1e8520e5a7612784874..7ddcf1cacb8ec2268d18d888108af0ac3cda470f 100644
--- a/src/gpu/GrDrawTarget.cpp
+++ b/src/gpu/GrDrawTarget.cpp
@@ -33,8 +33,6 @@
 #include "batches/GrRectBatchFactory.h"
 #include "batches/GrStencilPathBatch.h"
 
-#include "instanced/InstancedRendering.h"
-
 ////////////////////////////////////////////////////////////////////////////////
 
 // Experimentally we have found that most batching occurs within the first 10 comparisons.
@@ -47,8 +45,7 @@
     , fResourceProvider(resourceProvider)
     , fAuditTrail(auditTrail)
     , fFlags(0)
-    , fRenderTarget(rt)
-    , fInstancedRendering(fGpu->createInstancedRenderingIfSupported()) {
+    , fRenderTarget(rt) {
     // TODO: Stop extracting the context (currently needed by GrClipMaskManager)
     fContext = fGpu->getContext();
 
@@ -204,10 +201,6 @@
             fBatches[i]->prepare(flushState);
         }
     }
-
-    if (fInstancedRendering) {
-        fInstancedRendering->beginFlush(flushState->resourceProvider());
-    }
 }
 
 void GrDrawTarget::drawBatches(GrBatchFlushState* flushState) {
@@ -265,9 +258,6 @@
 
 void GrDrawTarget::reset() {
     fBatches.reset();
-    if (fInstancedRendering) {
-        fInstancedRendering->endFlush();
-    }
 }
 
 void GrDrawTarget::drawBatch(const GrPipelineBuilder& pipelineBuilder,