Always use Desktop GL 4.1 or less BindBufferRange behavior.

gpu/command_buffer/service/indexed_buffer_binding_host.cc

 // Copyright (c) 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "gpu/command_buffer/service/indexed_buffer_binding_host.h"
 
 #include "gpu/command_buffer/service/buffer_manager.h"
 
 namespace gpu {
 namespace gles2 {
@@ skipping 62 matching lines @@
   offset = 0;
   size = 0;
   effective_full_buffer_size = 0;
 }
 
 
 IndexedBufferBindingHost::IndexedBufferBindingHost(
     uint32_t max_bindings, bool needs_emulation)
     : needs_emulation_(needs_emulation),
       max_non_null_binding_index_plus_one_(0u) {
+  DCHECK(needs_emulation);
   buffer_bindings_.resize(max_bindings);
 }
 
 IndexedBufferBindingHost::~IndexedBufferBindingHost() {
 }
 
 void IndexedBufferBindingHost::DoBindBufferBase(
     GLenum target, GLuint index, Buffer* buffer) {
   DCHECK_LT(index, buffer_bindings_.size());
   GLuint service_id = buffer ? buffer->service_id() : 0;
@@ skipping 166 matching lines @@
           max_non_null_binding_index_plus_one_ = ii;
           break;
         }
       }
     }
   }
 }
 
 }  // namespace gles2
 }  // namespace gpu