Implement GL_EXT_occlusion_query_boolean on OSX

gpu/command_buffer/service/query_manager.h

Index: gpu/command_buffer/service/query_manager.h
diff --git a/gpu/command_buffer/service/query_manager.h b/gpu/command_buffer/service/query_manager.h
index 36753e72258240c587c700ace0d81966d0ef76e4..1560a94d85a560d355e1d76d0d15564d48f0e178 100644
--- a/gpu/command_buffer/service/query_manager.h
+++ b/gpu/command_buffer/service/query_manager.h
@@ -11,6 +11,7 @@
 #include "base/logging.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
+#include "gpu/command_buffer/service/feature_info.h"
 #include "gpu/command_buffer/service/gl_utils.h"
 #include "gpu/gpu_export.h"
 
@@ -20,6 +21,8 @@ class CommonDecoder;
 
 namespace gles2 {
 
+class FeatureInfo;
+
 // This class keeps track of the queries and their state
 // As Queries are not shared there is one QueryManager per context.
 class GPU_EXPORT QueryManager {
@@ -129,7 +132,7 @@ class GPU_EXPORT QueryManager {
 
   QueryManager(
       CommonDecoder* decoder,
-      bool use_arb_occlusion_query2_for_occlusion_query_boolean);
+      FeatureInfo* feature_info);
   ~QueryManager();
 
   // Must call before destruction.
@@ -175,10 +178,15 @@ class GPU_EXPORT QueryManager {
   // Returns false if any query is pointing to invalid shared memory.
   bool RemovePendingQuery(Query* query);
 
+  // Returns a target used for the underlying GL extension
+  // used to emulate a query.
+  GLenum AdjustTargetForEmulation(GLenum target);
+
   // Used to validate shared memory.
   CommonDecoder* decoder_;
 
   bool use_arb_occlusion_query2_for_occlusion_query_boolean_;
+  bool use_arb_occlusion_query_for_occlusion_query_boolean_;
 
   // Counts the number of Queries allocated with 'this' as their manager.
   // Allows checking no Query will outlive this.