Oilpan: fix unit tests bugs unmasked by r196836.

Source/core/editing/GranularityStrategyTest.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 "bindings/core/v8/ExceptionStatePlaceholder.h"
 #include "core/HTMLNames.h"
 #include "core/dom/Document.h"
 #include "core/dom/Element.h"
@@ skipping 52 matching lines @@
     void testDirectionSwitchSide();
 
     // Pixel coordinates of the positions for each letter within the text being tested.
     std::vector<IntPoint> m_letterPos;
     // Pixel coordinates of the middles of the words in the text being tested.
     // (y coordinate is based on y coordinates of m_letterPos)
     std::vector<IntPoint> m_wordMiddles;
 
 private:
     OwnPtr<DummyPageHolder> m_dummyPageHolder;
-    RawPtr<HTMLDocument> m_document;
+    RawPtrWillBePersistent<HTMLDocument> m_document;
 };
 
 void GranularityStrategyTest::SetUp()
 {
     m_dummyPageHolder = DummyPageHolder::create(IntSize(800, 600));
     m_document = toHTMLDocument(&m_dummyPageHolder->document());
     ASSERT(m_document);
     dummyPageHolder().frame().settings()->setDefaultFontSize(12);
     dummyPageHolder().frame().settings()->setSelectionStrategy(SelectionStrategy::Direction);
 }
@@ skipping 569 matching lines @@
 
     // "ab cd efghijkl ^mnopqr |>stuvwi inm," (^ means base and | means extent,
     // > means end).
     selection().setSelection(VisibleSelection(Position(text, 15), Position(text, 22)));
     EXPECT_EQ_SELECTED_TEXT("mnopqr ");
     selection().moveRangeSelectionExtent(m_wordMiddles[4]);
     EXPECT_EQ_SELECTED_TEXT("mnopqr iiin");
 }
 
 } // namespace blink