Oilpan: have Navigator and its supplements be on the heap by default.

Source/modules/permissions/NavigatorPermissions.cpp

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 #include "modules/permissions/NavigatorPermissions.h"
 
 #include "core/frame/Navigator.h"
 #include "modules/permissions/Permissions.h"
 
 namespace blink {
 
 NavigatorPermissions::NavigatorPermissions()
 {
 }
 
-NavigatorPermissions::~NavigatorPermissions()
-{
-}
-
 // static
 const char* NavigatorPermissions::supplementName()
 {
     return "NavigatorPermissions";
 }
 
 // static
 NavigatorPermissions& NavigatorPermissions::from(Navigator& navigator)
 {
-    NavigatorPermissions* supplement = static_cast<NavigatorPermissions*>(WillBeHeapSupplement<Navigator>::from(navigator, supplementName()));
+    NavigatorPermissions* supplement = static_cast<NavigatorPermissions*>(HeapSupplement<Navigator>::from(navigator, supplementName()));
     if (!supplement) {
         supplement = new NavigatorPermissions();
-        provideTo(navigator, supplementName(), adoptPtrWillBeNoop(supplement));
+        provideTo(navigator, supplementName(), supplement);
     }
     return *supplement;
 }
 
 // static
 Permissions* NavigatorPermissions::permissions(Navigator& navigator)
 {
     NavigatorPermissions& self = NavigatorPermissions::from(navigator);
     if (!self.m_permissions)
         self.m_permissions = new Permissions();
     return self.m_permissions.get();
 }
 
 DEFINE_TRACE(NavigatorPermissions)
 {
     visitor->trace(m_permissions);
-    WillBeHeapSupplement<Navigator>::trace(visitor);
+    HeapSupplement<Navigator>::trace(visitor);
 }
 
 } // namespace blink