Allowed GLES query target migration between binary occlusion types

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 <deque>
 #include <vector>
 #include "base/atomicops.h"
@@ skipping 52 matching lines @@
     // Returns false if shared memory for sync is invalid.
     virtual bool End(base::subtle::Atomic32 submit_count) = 0;
 
     // Returns false if shared memory for sync is invalid.
     virtual bool Process(bool did_finish) = 0;
 
     virtual void Destroy(bool have_context) = 0;
 
     void AddCallback(base::Closure callback);
 
+    bool UpdateTarget(GLenum target);
+
    protected:
     virtual ~Query();
 
     QueryManager* manager() const {
       return manager_;
     }
 
     void MarkAsDeleted() {
       deleted_ = true;
     }
@@ skipping 158 matching lines @@
   // Async pixel transfer queries waiting for completion.
   QueryQueue pending_transfer_queries_;
 
   DISALLOW_COPY_AND_ASSIGN(QueryManager);
 };
 
 }  // namespace gles2
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_QUERY_MANAGER_H_