Oilpan: Replace RefPtrs to Document in core/{accessibility,animation,fetch} with Oilpan transition …

Source/core/animation/AnimationPlayerTest.cpp

 /*
  * Copyright (c) 2013, Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 64 matching lines @@
         return Animation::create(0, nullptr, timing);
     }
 
     bool updateTimeline(double time)
     {
         document->animationClock().updateTime(time);
         // The timeline does not know about our player, so we have to explicitly call update().
         return player->update(TimingUpdateOnDemand);
     }
 
-    RefPtr<Document> document;
+    RefPtrWillBePersistent<Document> document;
     RefPtrWillBePersistent<AnimationTimeline> timeline;
     RefPtrWillBePersistent<AnimationPlayer> player;
     TrackExceptionState exceptionState;
 };
 
 TEST_F(AnimationAnimationPlayerTest, InitialState)
 {
     setUpWithoutStartingTimeline();
     player = timeline->createAnimationPlayer(0);
     EXPECT_EQ(0, player->currentTimeInternal());
@@ skipping 632 matching lines @@
     players.append(player1);
     players.append(player3);
     players.append(player4);
     for (size_t i = 0; i < players.size(); i++) {
         for (size_t j = 0; j < players.size(); j++)
             EXPECT_EQ(i < j, AnimationPlayer::hasLowerPriority(players[i].get(), players[j].get()));
     }
 }
 
 }