Allowed GLES query target migration between binary occlusion types

gpu/command_buffer/client/query_tracker.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_CLIENT_QUERY_TRACKER_H_
 #define GPU_COMMAND_BUFFER_CLIENT_QUERY_TRACKER_H_
 
 #include <GLES2/gl2.h>
 
 #include <bitset>
@@ skipping 118 matching lines @@
       return state_ == kPending;
     }
 
     bool CheckResultsAvailable(CommandBufferHelper* helper);
 
     uint32 GetResult() const;
 
     void Begin(GLES2Implementation* gl);
     void End(GLES2Implementation* gl);
 
+    bool UpdateTarget(GLenum target);
+
    private:
     friend class QueryTracker;
     friend class QueryTrackerTest;
 
     GLuint id_;
     GLenum target_;
     QuerySyncManager::QueryInfo info_;
     State state_;
     base::subtle::Atomic32 submit_count_;
     int32 token_;
@@ skipping 19 matching lines @@
   QueryList removed_queries_;
   QuerySyncManager query_sync_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(QueryTracker);
 };
 
 }  // namespace gles2
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_CLIENT_QUERY_TRACKER_H_