Oilpan: Prepare to support garbage-collected Node in WebNode hierarchy.

Source/web/tests/TextFinderTest.cpp

 // Copyright 2014 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 "web/TextFinder.h"
 
 #include "bindings/v8/ExceptionStatePlaceholder.h"
 #include "core/dom/Document.h"
@@ skipping 16 matching lines @@
 protected:
     virtual void SetUp() OVERRIDE;
 
     Document& document() const;
     TextFinder& textFinder() const;
 
     static WebFloatRect findInPageRect(Node* startContainer, int startOffset, Node* endContainer, int endOffset);
 
 private:
     FrameTestHelpers::WebViewHelper m_webViewHelper;
-    RefPtr<Document> m_document;
+    RefPtrWillBePersistent<Document> m_document;
     TextFinder* m_textFinder;
 };
 
 void TextFinderTest::SetUp()
 {
     m_webViewHelper.initialize();
     WebLocalFrameImpl& frameImpl = *m_webViewHelper.webViewImpl()->mainFrameImpl();
     frameImpl.viewImpl()->resize(WebSize(640, 480));
-    m_document = PassRefPtr<Document>(frameImpl.document());
+    m_document = PassRefPtrWillBeRawPtr<Document>(frameImpl.document());
     m_textFinder = &frameImpl.ensureTextFinder();
 }
 
 Document& TextFinderTest::document() const
 {
     return *m_document;
 }
 
 TextFinder& TextFinderTest::textFinder() const
 {
@@ skipping 225 matching lines @@
     EXPECT_EQ(3, textFinder().totalMatchCount());
     WebVector<WebFloatRect> matchRects;
     textFinder().findMatchRects(matchRects);
     ASSERT_EQ(3u, matchRects.size());
     EXPECT_EQ(findInPageRect(textInUElement, 0, textInUElement, 3), matchRects[0]);
     EXPECT_EQ(findInPageRect(textInBElement, 0, textInBElement, 3), matchRects[1]);
     EXPECT_EQ(findInPageRect(textInIElement, 0, textInIElement, 3), matchRects[2]);
 }
 
 } // namespace