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

Source/modules/credentialmanager/NavigatorCredentials.cpp

Index: Source/modules/credentialmanager/NavigatorCredentials.cpp
diff --git a/Source/modules/credentialmanager/NavigatorCredentials.cpp b/Source/modules/credentialmanager/NavigatorCredentials.cpp
index 1138ce0e25b83a80f5f95198b6e6004d90ac4bd6..304f5c8819f6d97c38b9e6eb78a1533512904556 100644
--- a/Source/modules/credentialmanager/NavigatorCredentials.cpp
+++ b/Source/modules/credentialmanager/NavigatorCredentials.cpp
@@ -18,14 +18,16 @@ NavigatorCredentials::NavigatorCredentials(Navigator& navigator)
 {
 }
 
-DEFINE_EMPTY_DESTRUCTOR_WILL_BE_REMOVED(NavigatorCredentials);
+NavigatorCredentials::~NavigatorCredentials()
+{
+}
 
 NavigatorCredentials& NavigatorCredentials::from(Navigator& navigator)
 {
-    NavigatorCredentials* supplement = static_cast<NavigatorCredentials*>(WillBeHeapSupplement<Navigator>::from(navigator, supplementName()));
+    NavigatorCredentials* supplement = static_cast<NavigatorCredentials*>(HeapSupplement<Navigator>::from(navigator, supplementName()));
     if (!supplement) {
         supplement = new NavigatorCredentials(navigator);
-        provideTo(navigator, supplementName(), adoptPtrWillBeNoop(supplement));
+        provideTo(navigator, supplementName(), supplement);
     }
     return *supplement;
 }
@@ -50,7 +52,7 @@ CredentialsContainer* NavigatorCredentials::credentials()
 DEFINE_TRACE(NavigatorCredentials)
 {
     visitor->trace(m_credentialsContainer);
-    WillBeHeapSupplement<Navigator>::trace(visitor);
+    HeapSupplement<Navigator>::trace(visitor);
     DOMWindowProperty::trace(visitor);
 }