Oilpan: Remove most WillBe types from the code base

third_party/WebKit/Source/web/tests/WebScopedWindowFocusAllowedIndicatorTest.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 20 matching lines @@
 #include "public/web/WebScopedWindowFocusAllowedIndicator.h"
 
 #include "core/dom/Document.h"
 #include "public/web/WebDocument.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace blink {
 
 TEST(WebScopedWindowFocusAllowedIndicatorTest, Basic)
 {
-    RefPtrWillBePersistent<Document> document = Document::create();
+    Persistent<Document> document = Document::create();
     WebDocument webDocument(document);
 
     EXPECT_FALSE(document->isWindowInteractionAllowed());
     {
         WebScopedWindowFocusAllowedIndicator indicator1(&webDocument);
         EXPECT_TRUE(document->isWindowInteractionAllowed());
         {
             WebScopedWindowFocusAllowedIndicator indicator2(&webDocument);
             EXPECT_TRUE(document->isWindowInteractionAllowed());
         }
         EXPECT_TRUE(document->isWindowInteractionAllowed());
     }
     EXPECT_FALSE(document->isWindowInteractionAllowed());
 }
 
 } // namespace blink