Oilpan: Prepare to move AXObjectCache to the 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 502278ade247a9e048f96fb639f9aa4ed5097f74..33e430d9d2bef0d601d29d24e1a1f5b29a01583d 100644
--- a/Source/modules/accessibility/InspectorAccessibilityAgent.cpp
+++ b/Source/modules/accessibility/InspectorAccessibilityAgent.cpp
@@ -425,10 +425,16 @@ void InspectorAccessibilityAgent::getAXNode(ErrorString* errorString, int nodeId
     if (!node)
         return;
     Document& document = node->document();
+#if ENABLE(OILPAN)

[haraken, 2015/04/28 10:45:21]

Would you elaborate on why we need a different logic between oilpan and
non-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;