Migrate ProfilerGPU to new lightweight queries API

Source/Engine/Profiler/ProfilerGPU.h

@@ -7,8 +7,6 @@
 #include "Engine/Scripting/ScriptingType.h"
 #include "RenderStats.h"
 
-class GPUTimerQuery;
-
 #if COMPILE_WITH_PROFILER
 
 // Profiler events buffers capacity (tweaked manually)
@@ -38,7 +36,7 @@ public:
         /// <summary>
         /// The timer query used to get the exact event time on a GPU. Assigned and managed by the internal profiler layer.
         /// </summary>
-        API_FIELD() GPUTimerQuery* Timer;
+        API_FIELD() uint64 Query;
 
         /// <summary>
         /// The rendering stats for this event. When event is active it holds the stats on event begin.
@@ -54,6 +52,11 @@ public:
         /// The event depth. Value 0 is used for the root events.
         /// </summary>
         API_FIELD() int32 Depth;
+
+        /// <summary>
+        /// True if event timer query is active.
+        /// </summary>
+        API_FIELD() bool QueryActive;
     };
 
     /// <summary>
@@ -84,7 +87,7 @@ public:
         /// <summary>
         /// Ends all used timer queries.
         /// </summary>
-        void EndAll();
+        void EndAllQueries();
 
         /// <summary>
         /// Tries the resolve this frame. Skips if already resolved or has no collected events.
@@ -123,11 +126,6 @@ public:
 private:
     static int32 _depth;
 
-    static Array<GPUTimerQuery*> _timerQueriesPool;
-    static Array<GPUTimerQuery*> _timerQueriesFree;
-
-    static GPUTimerQuery* GetTimerQuery();
-
 public:
     /// <summary>
     /// True if GPU profiling is enabled, otherwise false to disable events collecting and GPU timer queries usage. Can be changed during rendering.