GeolocationController should use HeapVector instead of PersistentHeapVector

This is a follow-up fix after r175430.
We don't need to use a PersistentHeapVector on a stack.

BUG=340522

Review URL: https://codereview.chromium.org/316823003

git-svn-id: svn://svn.chromium.org/blink/trunk@175479 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/Source/modules/geolocation/GeolocationController.cpp

@@ -154,7 +154,7 @@ void GeolocationController::positionChanged(GeolocationPosition* position)
         return;
     }
     m_lastPosition = position;
-    WillBePersistentHeapVector<RefPtrWillBeMember<Geolocation> > observersVector;
+    WillBeHeapVector<RefPtrWillBeMember<Geolocation> > observersVector;
     copyToVector(m_observers, observersVector);
     for (size_t i = 0; i < observersVector.size(); ++i)
         observersVector[i]->positionChanged();
@@ -162,7 +162,7 @@ void GeolocationController::positionChanged(GeolocationPosition* position)
 
 void GeolocationController::errorOccurred(GeolocationError* error)
 {
-    WillBePersistentHeapVector<RefPtrWillBeMember<Geolocation> > observersVector;
+    WillBeHeapVector<RefPtrWillBeMember<Geolocation> > observersVector;
     copyToVector(m_observers, observersVector);
     for (size_t i = 0; i < observersVector.size(); ++i)
         observersVector[i]->setError(error);