Oilpan: Prepare moving AXObject to heap

Source/modules/accessibility/InspectorAccessibilityAgent.cpp

Index: Source/modules/accessibility/InspectorAccessibilityAgent.cpp
diff --git a/Source/modules/accessibility/InspectorAccessibilityAgent.cpp b/Source/modules/accessibility/InspectorAccessibilityAgent.cpp
index fe1664975ef649c729a11bc6d63cb6b452e2ebc6..33e430d9d2bef0d601d29d24e1a1f5b29a01583d 100644
--- a/Source/modules/accessibility/InspectorAccessibilityAgent.cpp
+++ b/Source/modules/accessibility/InspectorAccessibilityAgent.cpp
@@ -425,8 +425,16 @@ void InspectorAccessibilityAgent::getAXNode(ErrorString* errorString, int nodeId
     if (!node)
         return;
     Document& document = node->document();
-    RefPtr<ScopedAXObjectCache> cache(adoptRef(new ScopedAXObjectCache(document)));
-    AXObjectCacheImpl* cacheImpl = toAXObjectCacheImpl(cache->get());
+#if ENABLE(OILPAN)
+    if (!document.axObjectCache())
+        return;
+    ScopedAXObjectCache cache(document);
+    AXObjectCacheImpl* cacheImpl = toAXObjectCacheImpl(cache.get());
+#else
+    AXObjectCacheImpl* cacheImpl = toAXObjectCacheImpl(document.axObjectCache());
+    if (!cacheImpl)
+        return;
+#endif
     AXObject* axObject = cacheImpl->getOrCreate(node);
     if (!axObject)
         return;