Pass implementation object to supplemental classes by reference

Source/modules/screen_orientation/ScreenOrientationController.cpp

Index: Source/modules/screen_orientation/ScreenOrientationController.cpp
diff --git a/Source/modules/screen_orientation/ScreenOrientationController.cpp b/Source/modules/screen_orientation/ScreenOrientationController.cpp
index 49c11dbfd772bd9372822351f4e24b10ff415d60..c3f9974088792d15d72323d61227ca46cf994e01 100644
--- a/Source/modules/screen_orientation/ScreenOrientationController.cpp
+++ b/Source/modules/screen_orientation/ScreenOrientationController.cpp
@@ -18,14 +18,14 @@ ScreenOrientationController::~ScreenOrientationController()
     ScreenOrientationDispatcher::instance().removeController(this);
 }
 
-ScreenOrientationController* ScreenOrientationController::from(Document* document)
+ScreenOrientationController& ScreenOrientationController::from(Document& document)
 {
     ScreenOrientationController* controller = static_cast<ScreenOrientationController*>(DocumentSupplement::from(document, supplementName()));
     if (!controller) {
-        controller = new ScreenOrientationController(*document);
+        controller = new ScreenOrientationController(document);
         DocumentSupplement::provideTo(document, supplementName(), adoptPtr(controller));
     }
-    return controller;
+    return *controller;
 }
 
 ScreenOrientationController::ScreenOrientationController(Document& document)