Add ES 3.0 fallback for instanced rendering

src/gpu/instanced/GLInstancedRendering.h

 /*
  * Copyright 2016 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef gr_instanced_GLInstancedRendering_DEFINED
 #define gr_instanced_GLInstancedRendering_DEFINED
 
@@ skipping 25 matching lines @@
     Batch* createBatch() override;
 
     void onBeginFlush(GrResourceProvider*) override;
     void onDraw(const GrPipeline&, const InstanceProcessor&, const Batch*) override;
     void onEndFlush() override;
     void onResetGpuResources(ResetType) override;
 
     void flushInstanceAttribs(int baseInstance);
 
     struct GLDrawCmdInfo {
+        IndexRange fGeometry;
         int fInstanceCount;
-#if GR_GL_LOG_INSTANCED_BATCHES
-        IndexRange fGeometry;
-#endif
     };
 
     GrGLuint                              fVertexArrayID;
     SkAutoTUnref<GrBuffer>                fInstanceBuffer;
     SkAutoTUnref<GrBuffer>                fDrawIndirectBuffer;
     SkAutoSTMalloc<1024, GLDrawCmdInfo>   fGLDrawCmdsInfo;
     uint32_t                              fInstanceAttribsBufferUniqueId;
     int                                   fInstanceAttribsBaseInstance;
 
     class GLBatch;
 
     friend class ::GrGLCaps; // For CheckSupport.
 
     typedef InstancedRendering INHERITED;
 };
 
 }
 
 #endif