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

Source/modules/webgl/WebGLSync.cpp

Index: Source/modules/webgl/WebGLSync.cpp
diff --git a/Source/modules/webgl/WebGLSync.cpp b/Source/modules/webgl/WebGLSync.cpp
index 5d7dc9bb8e2e2379a3258b3d8887e5828c0df037..d98c2f5d2e22a4a1df3f6fb10f4fb21cffe56f6c 100644
--- a/Source/modules/webgl/WebGLSync.cpp
+++ b/Source/modules/webgl/WebGLSync.cpp
@@ -12,7 +12,13 @@
 
 WebGLSync::~WebGLSync()
 {
-    // See the comment in WebGLObject::detachAndDeleteObject().
+    // Always call detach here to ensure that platform object deletion
+    // happens with Oilpan enabled. It keeps the code regular to do it
+    // with or without Oilpan enabled.
+    //
+    // See comment in WebGLBuffer's destructor for additional
+    // information on why this is done for WebGLSharedObject-derived
+    // objects.
     detachAndDeleteObject();
 }