Oilpan: move Range object to the oilpan heap.

Source/core/editing/EditingStyle.cpp

Index: Source/core/editing/EditingStyle.cpp
diff --git a/Source/core/editing/EditingStyle.cpp b/Source/core/editing/EditingStyle.cpp
index 2d13115a59e9be5dddf6cdfdaeb69720b58165f0..e9b1d7be9d7c741d511bcb21f66e7d1910cf7650 100644
--- a/Source/core/editing/EditingStyle.cpp
+++ b/Source/core/editing/EditingStyle.cpp
@@ -1258,7 +1258,7 @@ PassRefPtr<EditingStyle> EditingStyle::styleAtSelectionStart(const VisibleSelect
     // Also, if the selection is a range, ignore the background color at the start of selection,
     // and find the background color of the common ancestor.
     if (shouldUseBackgroundColorInEffect && (selection.isRange() || hasTransparentBackgroundColor(style->m_mutableStyle.get()))) {
-        RefPtr<Range> range(selection.toNormalizedRange());
+        RefPtrWillBeRawPtr<Range> range(selection.toNormalizedRange());
         if (PassRefPtrWillBeRawPtr<CSSValue> value = backgroundColorInEffect(range->commonAncestorContainer(IGNORE_EXCEPTION)))
             style->setProperty(CSSPropertyBackgroundColor, value->cssText());
     }