Fix element array bug

gpu/command_buffer/client/vertex_array_object_manager.cc

 // Copyright (c) 2012 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 "../client/vertex_array_object_manager.h"
 
 #include "../client/gles2_cmd_helper.h"
 #include "../client/gles2_implementation.h"
 #include "../common/logging.h"
 
@@ skipping 191 matching lines @@
 void VertexArrayObject::UnbindBuffer(GLuint id) {
   for (size_t ii = 0; ii < vertex_attribs_.size(); ++ii) {
     VertexAttrib& attrib = vertex_attribs_[ii];
     if (attrib.buffer_id() == id) {
       attrib.set_buffer_id(0);
       if (attrib.enabled()) {
         ++num_client_side_pointers_enabled_;
       }
     }
   }
+  if (bound_element_array_buffer_id_ == id) {
+    bound_element_array_buffer_id_ = 0;
+  }
 }
 
 bool VertexArrayObject::BindElementArray(GLuint id) {
   if (id == bound_element_array_buffer_id_) {
     return false;
   }
   bound_element_array_buffer_id_ = id;
   return true;
 }
 bool VertexArrayObject::HaveEnabledClientSideBuffers() const {
@@ skipping 401 matching lines @@
       &simulated_client_side_buffers);
   *simulated = *simulated || simulated_client_side_buffers;
 #endif  // defined(GLES2_SUPPORT_CLIENT_SIDE_ARRAYS)
   return true;
 }
 
 }  // namespace gles2
 }  // namespace gpu