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

Source/modules/webgl/WebGLTransformFeedback.cpp

Index: Source/modules/webgl/WebGLTransformFeedback.cpp
diff --git a/Source/modules/webgl/WebGLTransformFeedback.cpp b/Source/modules/webgl/WebGLTransformFeedback.cpp
index ccb74c6afedba4f94797584c12d12f6445e09a40..fe69008fa0213e00f90bcc4c73b5d924b7035ebf 100644
--- a/Source/modules/webgl/WebGLTransformFeedback.cpp
+++ b/Source/modules/webgl/WebGLTransformFeedback.cpp
@@ -10,14 +10,20 @@
 
 namespace blink {
 
-WebGLTransformFeedback* WebGLTransformFeedback::create(WebGL2RenderingContextBase* ctx)
+PassRefPtrWillBeRawPtr<WebGLTransformFeedback> WebGLTransformFeedback::create(WebGL2RenderingContextBase* ctx)
 {
-    return new WebGLTransformFeedback(ctx);
+    return adoptRefWillBeNoop(new WebGLTransformFeedback(ctx));
 }
 
 WebGLTransformFeedback::~WebGLTransformFeedback()
 {
-    // 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();
 }