Revert of [Oilpan] Migrate classes under module/webgl onto oilpan heap

Source/modules/webgl/WebGLObject.cpp

Index: Source/modules/webgl/WebGLObject.cpp
diff --git a/Source/modules/webgl/WebGLObject.cpp b/Source/modules/webgl/WebGLObject.cpp
index 772b7238502c64ce25b9e0a0594b72472472e924..e84eb24742224fd9c3c4e1434a74ccee96547c03 100644
--- a/Source/modules/webgl/WebGLObject.cpp
+++ b/Source/modules/webgl/WebGLObject.cpp
@@ -69,11 +69,18 @@
 
 void WebGLObject::detachAndDeleteObject()
 {
-    // To ensure that all platform objects are deleted after being detached,
-    // this method does them together.
+    // Helper method that pairs detachment with platform object
+    // deletion.
     //
-    // The individual WebGL destructors need to call detachAndDeleteObject()
-    // rather than do it based on Oilpan GC.
+    // With Oilpan enabled, objects may end up being finalized without
+    // having been detached first. Consequently, the objects force
+    // detachment first before deleting the platform object. Without
+    // Oilpan, the objects will have been detached from the 'parent'
+    // objects first and do not separately require it when finalizing.
+    //
+    // However, as detach() is trivial, the individual WebGL
+    // destructors will always call detachAndDeleteObject() rather
+    // than do it based on Oilpan being enabled.
     detach();
     deleteObject(nullptr);
 }