Enable occlusion query feature on OpenGL3.3 and later

gpu/command_buffer/service/query_manager.h

 // 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.
 
 #ifndef GPU_COMMAND_BUFFER_SERVICE_QUERY_MANAGER_H_
 #define GPU_COMMAND_BUFFER_SERVICE_QUERY_MANAGER_H_
 
 #include <stdint.h>
 
 #include <deque>
@@ skipping 287 matching lines @@
   void UpdateDisjointValue();
 
   // Safely resets the disjoint value if no queries are active.
   void SafelyResetDisjointValue();
 
   // Used to validate shared memory and get GL errors.
   GLES2Decoder* decoder_;
 
   bool use_arb_occlusion_query2_for_occlusion_query_boolean_;
   bool use_arb_occlusion_query_for_occlusion_query_boolean_;
+  bool no_covert_any_samples_passed_conservative_target_for_es3_;
+  bool covert_any_samples_passed_conservative_target_for_low_gl_;
 
   // Whether we are tracking disjoint values every frame.
   bool update_disjoints_continually_;
 
   // The shared memory used for disjoint notifications.
   int32_t disjoint_notify_shm_id_;
   uint32_t disjoint_notify_shm_offset_;
 
   // Current number of disjoints notified.
   uint32_t disjoints_notified_;
@@ skipping 22 matching lines @@
 
   scoped_refptr<gl::GPUTimingClient> gpu_timing_client_;
 
   DISALLOW_COPY_AND_ASSIGN(QueryManager);
 };
 
 }  // namespace gles2
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_QUERY_MANAGER_H_