Oilpan: Prepare to move AXObjectCache to the heap

Source/modules/accessibility/AXObjectCacheImpl.h

Index: Source/modules/accessibility/AXObjectCacheImpl.h
diff --git a/Source/modules/accessibility/AXObjectCacheImpl.h b/Source/modules/accessibility/AXObjectCacheImpl.h
index 8d85fc2fa8f9ffff601396af62966c34ed3a1c96..a746643f83e48be0d38f977a64bab065fda185e9 100644
--- a/Source/modules/accessibility/AXObjectCacheImpl.h
+++ b/Source/modules/accessibility/AXObjectCacheImpl.h
@@ -55,15 +55,19 @@ struct TextMarkerData {
 
 // This class should only be used from inside the accessibility directory.
 class MODULES_EXPORT AXObjectCacheImpl : public AXObjectCache {
-    WTF_MAKE_NONCOPYABLE(AXObjectCacheImpl); WTF_MAKE_FAST_ALLOCATED(AXObjectCacheImpl);
+    WTF_MAKE_NONCOPYABLE(AXObjectCacheImpl);
+    WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED(AXObjectCacheImpl);

[haraken, 2015/05/29 09:16:19]

I think you can just remove this, since we have
WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED on AXObjectCache.

[keishi, 2015/06/08 06:27:52]

Done.

 public:
-    static PassOwnPtr<AXObjectCache> create(Document&);
+    static PassOwnPtrWillBeRawPtr<AXObjectCache> create(Document&);
 
     explicit AXObjectCacheImpl(Document&);
     ~AXObjectCacheImpl();
+    DECLARE_VIRTUAL_TRACE();
 
     AXObject* focusedUIElementForPage(const Page*);
 
+    virtual void dispose() override;
+
     virtual void selectionChanged(Node*) override;
     virtual void childrenChanged(Node*) override;
     virtual void childrenChanged(LayoutObject*) override;
@@ -213,6 +217,11 @@ private:
 
     HashSet<AXID> m_idsInUse;
 
+#if ENABLE(ASSERT)
+    // Verified when finalizing.
+    bool m_hasBeenDisposed;
+#endif
+
     //
     // Aria-owns
     //